Śrī Caitanya Mahāprabhu went to Gayā to offer respectful oblations to His forefathers. This process is called piṇḍa-dāna. In Vedic society, after the death of a relative, especially one's father or mother, one must go to Gayā and there offeroblations to the lotus feet of Lord Viṣṇu. Therefore hundreds and thousands of men gather in Gayā daily to offer such oblations, or śrāddha. Following this principle, Lord Caitanya Mahāprabhu also went there to offer piṇḍa to His dead father. Fortunately He met Īśvara Purī there.
(Sri Caitanya Caritamrta-----1:17:8-----purport).

The subject matter of the Hari-bhakti-vilāsa, by Śrī Sanātana Gosvāmī, was collected by Śrīla Gopāla Bhaṭṭa Gosvāmī and is known as a vaiṣṇava-smṛti. This vaiṣṇava-smṛti-grantha was finished in twenty chapters, known as vilāsas. ...
In the ninth vilāsa, there are descriptions about collecting tulasī leaves, offering oblations to forefathers according to Vaiṣṇava rituals, and offering food.
(Sri Caitanya Caritamrta-----2:1:35-----purport).

The Hari-bhakti-vilāsa (17.11–12), in discussing the puraścaryā process, quotes the following verses from the Agastya-saṁhitā:
pūjā traikālikī nityaṁ japas tarpaṇam eva ca
homo brāhmaṇa-bhuktiś ca puraścaraṇam ucyate
guror labdhasya mantrasya prasādena yathā-vidhi
pañcāṅgopāsanā-siddhyai puraś caitad vidhīyate
"'In the morning, afternoon and evening one should worship the Deity, chant the Hare Kṛṣṇa mantra, offer oblations, perform a fire sacrifice and feed the brāhmaṇas. These five activities constitute puraścaryā. To attain full success when taking initiation from the spiritual master, one should first perform these puraścaryā processes.'"
(Sri Caitanya Caritamrta-----2:15:108-----purport).

It is said:
adhyāpanaṁ brahma-yajñaḥ pitṛ-yajñas tu tarpaṇam
homo daivo balir bhauto nṛ-yajño ‘tithi-pūjanam
"By offering oblations with ghee, one satisfies the demigods. By studying the Vedas, one performs brahma-yajña, which satisfies the great sages. Offering libations of water before one's forefathers is called pitṛ-yajña. By offering tribute, one performs bhūta-yajña. By properly receiving guests, one performs nṛ-yajña." These are the five yajñas that liquidate the five kinds of indebtedness—indebtedness to the demigods, great sages, forefathers, living entities and common men. Therefore one has to perform these five kinds of yajñas. But when one takes to the saṅkīrtana-yajña (the chanting of the Hare Kṛṣṇa mantra), one does not have to perform any other yajña.
(Sri Caitanya Caritamrta-----2:22:141-----purport).

Upon making this decision, the two brothers at once took steps to leave their material engagements, and they appointed two learned brāhmaṇas to perform certain Vedic religious rituals that would enable them to achieve complete freedom for the devotional service of Kṛṣṇa. These preliminary activities are known as puraścaryā. These ritualistic functions demand that three times a day one worships and offers respects to his forefathers, offers oblations to a fire, and respectfully offers food to a learned brāhmaṇa. Five items—time, worship, offering of respect, offering of oblation into the fire and offering of food to a brāhmaṇa—comprise puraścaryā. This and other rituals are mentioned in the hari-bhakti-vilāsa, the authoritative book of directions.
(Teachings of Lord Caitanya).

"Anything considered an opulence is fully present in Kṛṣṇa. As an individual soul is the basic principle of the growth of his material body, Kṛṣṇa is the Supersoul of this cosmic manifestation. All Vedic ritualistic ceremonies, such as the performance of sacrifices, the offering of oblations into the fire, the chanting of the Vedic hymns and the practice of mystic yoga, are meant for realizing Kṛṣṇa. Whether one follows the path of fruitive activities or the path of philosophical speculation, the ultimate destination is Kṛṣṇa; all bona fide methods of self-realization are meant for understanding Kṛṣṇa."
(Krsna Book).

While the discussion was going on, baby Kṛṣṇa cried. Without remonstration, mother Yaśodā picked the child up on her lap and called the learned brāhmaṇas to chant holy Vedic hymns to counteract the evil spirits. At the same time she allowed the baby to suck her breast. If a child sucks the mother's breast nicely, it is to be understood that he is out of all danger. After this, all the stronger cowherd men put the broken cart in order, and all the scattered things were set up nicely as before. The brāhmaṇas thereafter began to offer oblations to the sacrificial fire with yogurt, butter, kuśa grass and water. They worshiped the Supreme Personality of Godhead for the good fortune of the child.
(Krsna Book).

Anyone who hears the narration of the Kāliya serpent and his punishment will need fear no more the envious activities of snakes. The Lord also declared, "If one takes a bath in the Kāliya lake, where My cowherd boyfriends and I have bathed, or if one fasts for a day and offers oblations to the forefathers from the water of this lake, he will be relieved from all kinds of sinful reactions." The Lord also assured Kāliya: "You came here out of fear of Garuḍa, who wanted to eat you in the beautiful land by the ocean. Now, after seeing the marks where I have touched your head with My lotus feet, Garuḍa will not disturb you."
(Krsna Book).

Mahārāja Nanda finally relented. The cowherd men then inquired from Kṛṣṇa how He wanted the yajña performed, and Kṛṣṇa gave them the following directions. "Prepare very nice foods of all descriptions from the grain and ghee collected for the yajña. Prepare rice, dhal, then halavā, pakorā, purī and all kinds of milk preparations, such as sweet rice, rabrī, sweetballs, sandeśa, rasagullā and laḍḍu, and invite the learned brāhmaṇas who can chant the Vedic hymns and offer oblations to the fire. The brāhmaṇas should be given all kinds of grain in charity. Then decorate all the cows and feed them well. After performing this, give money in charity to the brāhmaṇas. As far as the lower animals are concerned, such as the dogs, and the lower grades of people, such as the caṇḍālas, or the fifth class of men, who are considered untouchable, they also may be given sumptuous prasādam. After nice grasses have been given to the cows, the sacrifice known as Govardhana-pūjā may immediately begin. This sacrifice will very much satisfy Me."
(Krsna Book).

The King's daughter, Rukmiṇī, was exquisitely beautiful. She was very clean and had beautiful teeth. The auspicious sacred thread was tied on her wrist. She was given various types of jewelry to wear and long silken cloth to cover the upper and lower parts of her body. Learned priests gave her protection by chanting mantras from the Sāma Veda, Ṛg Veda and Yajur Veda. Then they chanted mantras from the Atharva Veda and offered oblations in the fire to pacify the influence of different stars.
(Krsna Book).

In one palace he found Kṛṣṇa offering oblations to the sacrificial fire and performing the ritualistic ceremonies of the Vedas as enjoined for householders. In another palace he found Kṛṣṇa performing the pañca-yajña sacrifice, which is compulsory for a householder. This yajña is also known as pañca-sūnā. Knowingly or unknowingly, everyone, especially the householder, commits five kinds of sinful activities. When we receive water from a water pitcher, we kill many germs that are in it. Similarly, when we use a grinding machine or eat food, we kill many germs. When sweeping a floor or igniting a fire we kill many germs, and when we walk on the street we kill many ants and other insects. Consciously or unconsciously, in all our different activities, we are killing. Therefore, it is incumbent upon every householder to perform the pañca-sūnā sacrifice to rid himself of the reactions to such sinful activities.
(Krsna Book).

After His meditation, the Lord would regularly bathe early in the morning with clear, sanctified water. Then He would change into fresh clothing, cover Himself with a wrapper and engage Himself in His daily religious functions. Out of His many religious duties, the first was to offer oblations into the sacrificial fire and silently chant the Gāyatrī mantra. Lord Kṛṣṇa, as the ideal householder, executed all the religious functions of a householder without deviation. When the sunrise became visible, the Lord would offer specific prayers to the sun-god. The sun-god and other demigods mentioned in the Vedic scriptures are described as different limbs of the body of Lord Kṛṣṇa, and it is the duty of the householder to offer respects to the demigods and great sages, as well as the forefathers.
(Krsna Book).

Once upon a time, Lord Balarāma heard that an arrangement was being made for a fight between the two rival parties in the Kuru dynasty, one headed by Duryodhana and the other by the Pāṇḍavas. He did not like the idea, and He tried to act as mediator to stop the fighting. Finding it impossible, and not wishing to take an active part on behalf of either party, He left Dvārakā on the plea of visiting various holy places of pilgrimage. He first of all visited the place of pilgrimage known as Prabhāsa-kṣetra. He took His bath there, and He pacified the local brāhmaṇas and offered oblations to the demigods, Pitās, great sages and people in general, in accordance with Vedic ritualistic ceremonies. That is the Vedic method of visiting holy places.
(Krsna Book).

After this incident, Lord Balarāma took permission from the brāhmaṇas assembled at Naimiṣāraṇya and, accompanied by other brāhmaṇas, went to the bank of the river Kauśikī. After taking His bath in this holy place, He proceeded toward the river Sarayū and visited the source of the river. Traveling on the bank of the Sarayū River, He gradually reached Prayāga, where there is a confluence of three rivers—the Ganges, Yamunā and Sarasvatī. Here also He took His bath, and then He worshiped in the local temples of the demigods and, as enjoined in the Vedic literature, offered oblations to the forefathers and sages. He gradually reached the āśrama of the sage Pulaha and from there went to the rivers Gaṇḍakī and Gomatī. After this He took His bath in the river Vipāśā.
(Krsna Book).

Then He gradually came to the bank of the Śoṇa River. (The Śoṇa River is still running as one of the big rivers in Bihar Province.) He also took His bath there and performed the Vedic ritualistic ceremonies. He continued His travels and gradually came to the pilgrimage city of Gayā, where there is a celebrated Viṣṇu temple. According to the advice of His father, Vasudeva, He offered oblations to the forefathers in this Viṣṇu temple. From here He traveled to the delta of the Ganges, where the sacred river Ganges mixes with the Bay of Bengal. This sacred place is called Gaṅgāsāgara, and at the end of January every year there is still a great assembly of saintly persons and pious men, just as there is an assembly of saintly persons in Prayāga every year called the Māgha-melā fair.
(Krsna Book).

Vasudeva satisfied Lord Viṣṇu by performing different kinds of sacrifices, such as Jyotiṣṭoma and Darśa-pūrṇamāsa. Some of these yajñas are called prākṛta, and some of them are known as saurya-satra or vaikṛta. Thereafter, the other sacrifices, known as agnihotra, were also performed, and the prescribed articles were offered in the proper way. Thus Lord Viṣṇu was pleased. The ultimate purpose of offering oblations in sacrifice is to please Lord Viṣṇu. But in this Age of Kali it is very difficult to collect the different articles required for offering sacrifices. People have neither the means to collect the required paraphernalia nor the necessary knowledge or tendency to offer such sacrifices. Therefore, in this Age of Kali, when people are mostly unfortunate, full of anxieties and disturbed by various kinds of calamities, the only sacrifice recommended is the performance of saṅkīrtana-yajña. Worshiping Lord Caitanya by the saṅkīrtana-yajña is the only recommended process in this age.
(Krsna Book).