Mahārāja Parīkṣit, just after receiving the news of his death within seven days, at once retired from family life and shifted himself to the sacred bank of the Yamunā River. Generally it is said that the King took shelter on the bank of the Ganges, but according to Śrīla Jīva Gosvāmī, the King took shelter on the bank of the Yamunā. Śrīla Jīva Gosvāmī's statement appears to be more accurate because of the geographical situation. Mahārāja Parīkṣit resided in his capital Hastināpura, situated near present Delhi, and the River Yamunā flows down past the city. Naturally the King would take shelter of the River Yamunā because she was flowing past his palace door. And as far as sanctity is concerned, the River Yamunā is more directly connected with Lord Kṛṣṇa than the Ganges. The Lord sanctified the River Yamunā from the beginning of His transcendental pastimes in the world. While His father Vasudeva was crossing the Yamunā with the baby Lord Kṛṣṇa for a safe place at Gokula on the other bank of the river from Mathurā, the Lord fell down in the river, and by the dust of His lotus feet the river at once became sanctified. It is especially mentioned herein that Mahārāja Parīkṣit took shelter of that particular river which is beautifully flowing, carrying the dust of the lotus feet of Lord Kṛṣṇa, mixed with tulasī leaves. Lord Kṛṣṇa's lotus feet are always besmeared with the tulasī leaves, and thus as soon as His lotus feet contact the water of the Ganges and the Yamunā, the rivers become at once sanctified. The Lord, however, contacted the River Yamunā more than the Ganges. According to the Varāha Purāṇa, as quoted by Śrīla Jīva Gosvāmī, there is no difference between the water of the Ganges and the Yamunā, but when the water of the Ganges is sanctified one hundred times, it is called the Yamunā. Similarly, it is said in the scriptures that one thousand names of Viṣṇu are equal to one name of Rāma, and three names of Lord Rāma are equal to one name of Kṛṣṇa.
(Srimad Bhagavatam-------1:19:6------purport).

The water of the Ganges sanctifies all the three worlds, including the gods and the demigods, because it emanates from the lotus feet of the Personality of Godhead Viṣṇu. Lord Kṛṣṇa is the fountainhead of the principle of viṣṇu-tattva, and therefore shelter of His lotus feet can deliver one from all sins, including an offense committed by a king unto a brāhmaṇa. Mahārāja Parīkṣit, therefore, decided to meditate upon the lotus feet of Lord Śrī Kṛṣṇa, who is Mukunda, or the giver of liberations of all description. The banks of the Ganges or the Yamunā give one a chance to remember the Lord continuously. Mahārāja Parīkṣit freed himself from all sorts of material association and meditated upon the lotus feet of Lord Kṛṣṇa, and that is the way of liberation. To be free from all material association means to cease completely from committing any further sins. To meditate upon the lotus feet of the Lord means to become free from the effects of all previous sins. The conditions of the material world are so made that one has to commit sins willingly or unwillingly, and the best example is Mahārāja Parīkṣit himself, who was a recognized sinless, pious king. But he also became a victim of an offense, even though he was ever unwilling to commit such a mistake. He was cursed also, but because he was a great devotee of the Lord, even such reverses of life became favorable. The principle is that one should not willingly commit any sin in his life and should constantly remember the lotus feet of the Lord without deviation. Only in such a mood will the Lord help the devotee make regular progress toward the path of liberation and thus attain the lotus feet of the Lord.
(Srimad Bhagavatam-------1:19:7------purport).

The Lord is equal to every living entity, just like the flowing Ganges. The Ganges water is meant for the purification of everyone, yet the trees on the banks of the Ganges have different values. A mango tree on the bank of the Ganges drinks the water, and the nimba tree also drinks the same water. But the fruits of both trees are different. One is celestially sweet, and the other is hellishly bitter. The condemned bitterness of the nimba is due to its own past work, just as the sweetness of the mango is also due to its own karma. The Lord says in Bhagavad-gītā (16.19):
tān ahaṁ dviṣataḥ krūrān
saṁsāreṣu narādhamān
kṣipāmy ajasram aśubhān
āsurīṣv eva yoniṣu
"The envious, the mischievous, the lowest of mankind, these do I ever put back into the ocean of material existence, into various demoniac species of life." Demigods like Yamarāja and other controllers are there for the unwanted conditioned souls who always engage in threatening the tranquillity of the kingdom of God. Since all the demigods are confidential devotee-servitors of the Lord, they are never to be condemned.
(Srimad Bhagavatam-------3:5:8------purport).

The Lord is so kind that He has spread the River Ganges throughout the universe so that by taking bath in that holy river everyone can get release from the reactions of sins, which occur at every step. There are many rivers in the world which are able to evoke one's sense of God consciousness simply by one's bathing in them, and the River Ganges is chief amongst them. In India there are five sacred rivers, but the Ganges is the most sacred. The River Ganges and Bhagavad-gītā are chief sources of transcendental happiness for mankind, and intelligent persons can take shelter of them to go back home, back to Godhead. Even Śrīpāda Śaṅkarācārya recommends that a little knowledge in Bhagavad-gītā and the drinking of a little quantity of Ganges water can save one from the punishment of Yamarāja.
(Srimad Bhagavatam-------3:5:41------purport).

The Ganges water flows directly from the lotus feet of Viṣṇu, and its course runs from the highest planet of the universe down to the lowest. The sages came down from Satyaloka by taking advantage of the flowing water, a process of transportation made possible by the power of mystic yoga. If a river flows thousands and thousands of miles, a perfect yogī can at once transport himself from one place to another simply by dipping in its water. The Ganges is the only celestial river which flows throughout the universe, and great sages travel all over the universe via this sacred river.
(Srimad Bhagavatam-------3:5:8------purport).

The water of the Ganges is purified because it pours forth from the lotus feet of the Lord. Similarly, Bhagavad-gītā is as good as the water of the Ganges because it is spoken from the mouth of the Supreme Lord. So it is with any topic on the pastimes of the Lord or the characteristics of His transcendental activities. The Lord is absolute; there is no difference between His words, His perspiration or His pastimes. The water of the Ganges, the narrations of His pastimes and the words spoken by Him are all on the absolute platform, and thus taking shelter of any one of them is equally good. Śrīla Rūpa Gosvāmī has enunciated that anything in relationship with Kṛṣṇa is on the transcendental platform. If we can dovetail all our activities in relationship with Kṛṣṇa, then we do not stand on the material platform, but always on the spiritual platform.
(Srimad Bhagavatam-------3:20:5------purport).

Tulasī leaves are very important in the method of worshiping the Supreme Personality of Godhead. In this verse the word salilaiḥ means "by the water." Of course, Dhruva Mahārāja was worshiping on the bank of the Yamunā. The Yamunā and the Ganges are sacred, and sometimes devotees in India insist that the Deity must be worshiped with water of the Ganges or Yamunā. But here we understand deśa-kāla to mean "according to time and country." In the Western countries there is no River Yamunā or Ganges—water from such sacred rivers is not available. Does this mean that the arcā worship should for that reason be stopped? No. Salilaiḥ refers to any water—whatever is available—but it must be very clear and collected purely. That water can be used. The other paraphernalia, such as flower garlands, fruits and vegetables, should be collected according to the country and according to their availability. Tulasī leaves are very important for satisfying the Lord, so as far as possible an arrangement should be made for growing tulasī leaves. Dhruva Mahārāja was advised to worship the Lord with the fruits and flowers available in the forest. In the Bhagavad-gītā Kṛṣṇa frankly says that He accepts vegetables, fruits, flowers, etc. One should not offer Lord Vāsudeva anything other than what is prescribed herein by the great authority Nārada Muni. One cannot offer to the Deity according to one's whims; since these fruits and vegetables are available anywhere in the universe, we should observe this small point very attentively.
(Srimad Bhagavatam-------4:8:55------purport).

In India, one can actually see that a person who takes a bath in the Ganges waters daily is almost free from all kinds of diseases. A very respectable brāhmaṇa in Calcutta never took a doctor's medicine. Even though he sometimes felt sick, he would not accept medicine from the physician but would simply drink Ganges water, and he was always cured within a very short time. The glories of Ganges water are known to Indians and to ourselves also. The River Ganges flows by Calcutta. Sometimes within the water there are many stools and other dirty things which are washed away from neighboring mills and factories, but still thousands of men take baths in the Ganges water, and they are very healthy as well as spiritually inclined. That is the effect of Ganges water. The Ganges is glorified because it emanates from the toes of the lotus feet of the Lord. Similarly, if one takes to the service of the lotus feet of the Lord, or takes to Kṛṣṇa consciousness, he is immediately cleansed of the many dirty things which have accumulated in his innumerable births. We have seen that in spite of the very black record of their past lives, persons who take to Kṛṣṇa consciousness become perfectly cleansed of all dirty things and make spiritual progress very swiftly.
(Srimad Bhagavatam-------4:21:31------purport).

Bali Mahārāja wanted to give charity to Vāmanadeva, but the Lord expanded His body in such a way that He showed Bali Mahārāja that everything in the universe is already in His body. Actually, no one can give anything to the Supreme Personality of Godhead, for He is full in everything. Sometimes we see a devotee offering Ganges water to the Ganges. After taking his bath in the Ganges, a devotee takes a palmful of water and offers it back to the Ganges. Actually, when one takes a palmful of water from the Ganges, the Ganges does not lose anything, and similarly if a devotee offers a palmful of water to the Ganges, the Ganges does not increase in any way. But by such an offering, the devotee becomes celebrated as a devotee of mother Ganges. Similarly, when we offer anything with devotion and faith, what we offer does not belong to us, nor does it enrich the opulence of the Supreme Personality of Godhead. But if one offers whatever he has in his possession, he becomes a recognized devotee. In this regard, the example is given that when one's face is decorated with a garland and sandalwood pulp, the reflection of one's face in a mirror automatically becomes beautiful. The original source of everything is the Supreme Personality of Godhead, who is our original source also. Therefore when the Supreme Personality of Godhead is decorated, the devotees and all living entities are decorated automatically.
(Srimad Bhagavatam-------8:20:21------purport).

The water of the Ganges is supposed to rest on the head of Lord Śiva. Lord Śiva is an incarnation of the Supreme Personality of Godhead, who sustains the entire universe by different potencies. Lord Śiva is described in the Brahma-saṁhitā (5.45):
kṣīraṁ yathā dadhi vikāra-viśeṣa-yogāt
sañjāyate na hi tataḥ pṛthag asti hetoḥ
yaḥ śambhutām api tathā samupaiti kāryād
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
"Milk changes into yogurt when mixed with a yogurt culture, but actually yogurt is constitutionally nothing but milk. Similarly, Govinda, the Supreme Personality of Godhead, assumes the form of Lord Śiva for the special purpose of material transactions. I offer my obeisances at Lord Govinda's lotus feet." Lord Śiva is the Supreme Personality of Godhead in the same sense that yogurt is also milk although at the same time it is not milk. For the maintenance of the material world there are three incarnations—Brahmā, Viṣṇu and Maheśvara (Lord Śiva). Lord Śiva is Viṣṇu in an incarnation for the mode of ignorance. The material world exists predominantly in the mode of ignorance. Therefore Lord Śiva is compared here to the longitude and latitude of the entire universe, which resembles a cloth woven of threads extending for both its length and breadth.
(Srimad Bhagavatam-------9:9:7------purport).