One who has taken his birth is sure to die, and after death one is sure to take birth again. Therefore, in the unavoidable discharge of your duty, you should not lament.
(Bhagavad-Gita----2:27----translation).

Yamarāja, the great controller of life after death, decides the living entities' destinies in their next lives. He is surely among the most confidential representatives of the Lord. Such confidential posts are offered to great devotees of the Lord who are as good as His eternal associates in the spiritual sky.
(Srimad Bhagavatam----3:5:21----purport).

Unfortunately people do not know that there is life after death; therefore mundane people waste their time amassing material profit which has to be left behind at the time of death. Such profit has no eternal benefit. Similarly, adoration by mundane people is valueless because after death one has to accept another body. Material adoration and titles are decorations that cannot be carried over to the next body. In the next life, everything is forgotten.
(Sri Caitanya Caritamrta----2:19:159----purport).

Just as the most sinful wretch lives in a ghostly body after death and moves about in the ether, having been denied a gross body, so the impersonalist, although rising to the point of liberation in the transcendental position, falls back down to the material world because of not having developed the mood of loving service to the Supreme Lord. Therefore the severe austerities and penances the impersonalist performs are not equivalent to the eternal religion of devotional service.
(Renunciation Through Wisdom).

In this life, an envious person commits violent acts against many living entities. Therefore after his death, when he is taken to hell by Yamarāja, those living entities who were hurt by him appear as animals called rurus to inflict very severe pain upon him. Learned scholars call this hell Raurava. Not generally seen in this world, the ruru is more envious than a snake.
(Srimad Bhagavatam----5:26:11----translation).

A person is considered no better than a crow if after receiving some food, he does not divide it among guests, old men and children, but simply eats it himself, or if he eats it without performing the five kinds of sacrifice. After death he is put into the most abominable hell, known as Kṛmibhojana. In that hell is a lake 100,000 yojanas (800,000 miles) wide and filled with worms. He becomes a worm in that lake and feeds on the other worms there, who also feed on him. Unless he atones for his actions before his death, such a sinful man remains in the hellish lake of Kṛmibhojana for as many years as there are yojanas in the width of the lake.
(Srimad Bhagavatam----5:26:18----translation).

"Work done as a sacrifice for Viṣṇu has to be performed, otherwise work binds one to this material world. Therefore, O son of Kuntī, perform your prescribed duties for His satisfaction, and in that way you will always remain unattached and free from bondage." If we do not perform yajña and distribute prasāda to others, our lives are condemned. Only after performing yajña and distributing the prasāda to all dependents—children, brāhmaṇas and old men—should one eat. However, one who cooks only for himself or his family is condemned, along with everyone he feeds. After death he is put into the hell known as Kṛmibhojana.
(Srimad Bhagavatam----5:26:18----translation).

A person who indulges in sex indiscriminately—even with animals—is taken after death to the hell known as Vajrakaṇṭaka-śālmalī. In this hell there is a silk-cotton tree full of thorns as strong as thunderbolts. The agents of Yamarāja hang the sinful man on that tree and pull him down forcibly so that the thorns very severely tear his body.
(Srimad Bhagavatam----5:26:21----translation).

The shameless husbands of lowborn śūdra women live exactly like animals, and therefore they have no good behavior, cleanliness or regulated life. After death, such persons are thrown into the hell called Pūyoda, where they are put into an ocean filled with pus, stool, urine, mucus, saliva and similar things. Śūdras who could not improve themselves fall into that ocean and are forced to eat those disgusting things.
(Srimad Bhagavatam----5:26:23----translation).

If in this life a man of the higher classes (brāhmaṇa, kṣatriya and vaiśya) is very fond of taking his pet dogs, mules or asses into the forest to hunt and kill animals unnecessarily, he is placed after death into the hell known as Prāṇarodha. There the assistants of Yamarāja make him their targets and pierce him with arrows.
(Srimad Bhagavatam----5:26:24----translation).

A person who in this life is proud of his eminent position, and who heedlessly sacrifices animals simply for material prestige, is put into the hell called Viśasana after death. There the assistants of Yamarāja kill him after giving him unlimited pain.
(Srimad Bhagavatam----5:26:25----translation).

If a foolish member of the twice-born classes (brāhmaṇa, kṣatriya and vaiśya) forces his wife to drink his semen out of a lusty desire to keep her under control, he is put after death into the hell known as Lālābhakṣa. There he is thrown into a flowing river of semen, which he is forced to drink.
(Srimad Bhagavatam----5:26:26----translation).

In this world, some persons are professional plunderers who set fire to others' houses or administer poison to them. Also, members of the royalty or government officials sometimes plunder mercantile men by forcing them to pay income tax and by other methods. After death such demons are put into the hell known as Sārameyādana. On that planet there are 720 dogs with teeth as strong as thunderbolts. Under the orders of the agents of Yamarāja, these dogs voraciously devour such sinful people.
(Srimad Bhagavatam----5:26:27----translation).

A person who in this life bears false witness or lies while transacting business or giving charity is severely punished after death by the agents of Yamarāja. Such a sinful man is taken to the top of a mountain eight hundred miles high and thrown headfirst into the hell known as Avīcimat. This hell has no shelter and is made of strong stone resembling the waves of water. There is no water there, however, and thus it is called Avīcimat (waterless). Although the sinful man is repeatedly thrown from the mountain and his body broken to tiny pieces, he still does not die but continuously suffers chastisement.
(Srimad Bhagavatam----5:26:28----translation).

A lowborn and abominable person who in this life becomes falsely proud, thinking "I am great," and who thus fails to show proper respect to one more elevated than he by birth, austerity, education, behavior, caste or spiritual order, is like a dead man even in this lifetime, and after death he is thrown headfirst into the hell known as Kṣārakardama. There he must great suffer great tribulation at the hands of the agents of Yamarāja.
(Srimad Bhagavatam----5:26:30----translation).

There are men and women in this world who sacrifice human beings to Bhairava or Bhadra Kālī and then eat their victims' flesh. Those who perform such sacrifices are taken after death to the abode of Yamarāja, where their victims, having taken the form of Rākṣasas, cut them to pieces with sharpened swords. Just as in this world the man-eaters drank their victims' blood, dancing and singing in jubilation, their victims now enjoy drinking the blood of the sacrificers and celebrating in the same way.
(Srimad Bhagavatam----5:26:31----translation).

In this life some people give shelter to animals and birds that come to them for protection in the village or forest, and after making them believe that they will be protected, such people pierce them with lances or threads and play with them like toys, giving them great pain. After death such people are brought by the assistants of Yamarāja to the hell known as Śūlaprota, where their bodies are pierced with sharp, needlelike lances. They suffer from hunger and thirst, and sharp-beaked birds such as vultures and herons come at them from all sides to tear at their bodies. Tortured and suffering, they can then remember the sinful activities they committed in the past.
(Srimad Bhagavatam----5:26:32----translation).

Those who in this life are like envious serpents, always angry and giving pain to other living entities, fall after death into the hell known as Dandaśūka. My dear King, in this hell there are serpents with five or seven hoods. These serpents eat such sinful persons just as snakes eat mice.
(Srimad Bhagavatam----5:26:33----translation).

Those who in this life confine other living entities in dark wells, granaries or mountain caves are put after death into the hell known as Avaṭa-nirodhana. There they themselves are pushed into dark wells, where poisonous fumes and smoke suffocate them and they suffer very severely.
(Srimad Bhagavatam----5:26:34----translation).

According to the Vedic etiquette, even an enemy who comes to a householder's home should be received in such a gentle way that he forgets that he has come to the home of an enemy. A guest who comes to one's home should be received very politely. If he is unwanted, the householder should not stare at him with blinking eyes, for one who does so will be put into the hell known as Paryāvartana after death, and there many ferocious birds like vultures, crows, and coknis will suddenly come upon him and pluck out his eyes.
(Srimad Bhagavatam----5:26:35----translation).

A person who is very cruel is regarded as dead even while living, for while he is living or after his death, everyone condemns him. And after the death of a person in the bodily concept of life, he is undoubtedly transferred to the hell known as Andhatama.
(Srimad Bhagavatam----10:2:22----translation).

While living one may be proud of one's body, thinking oneself a very big man, minister, president or even demigod, but whatever one may be, after death this body will turn either into worms, into stool or into ashes. If one kills poor animals to satisfy the temporary whims of this body, one does not know that he will suffer in his next birth, for such a sinful miscreant must go to hell and suffer the results of his actions.
(Srimad Bhagavatam----10:10:10----translation).

A son who, though able to do so, fails to provide for his parents with his physical resources and wealth is forced after his death to eat his own flesh.
(Srimad Bhagavatam----10:45:6----translation).

The body of a brāhmaṇa is not intended to enjoy insignificant material sense gratification; rather, by accepting difficult austerities in his life, a brāhmaṇa will enjoy unlimited happiness after death.
(Srimad Bhagavatam----11:17:42----translation).

The material color of the mind is changed when one washes it from contaminations of life-breathing and thereby frees it from the contamination of repeated births and deaths and situates it in pure spiritual life. All is manifested by the temporary embodiment of the material body, which is a production of the mind at the time of death, and if the mind is purified by practice of transcendental loving service to the Lord and is constantly engaged in the service of the lotus feet of the Lord, there is no more chance of the mind's producing another material body after death. It will be freed from absorption in material contamination. The pure soul will be able to return home, back to Godhead.
(Srimad Bhagavatam----1:15:41----translation).

Apparently a devotee may grow old, but he is not subjected to the symptoms of defeat experienced by a common man in old age. Consequently, old age does not make a devotee fearful of death, as a common man is fearful of death. When jarā, or old age, takes shelter of a devotee, Kālakanyā diminishes the devotee's fear. A devotee knows thatafter death he is going back home, back to Godhead; therefore he has no fear of death. Thus instead of depressing a devotee, advanced age helps him become fearless and thus happy.
(Srimad Bhagavatam----4:27:24----purport).

In due course of time, when a pure devotee is completely prepared, all of a sudden the change of body occurs which is commonly called death. And for the pure devotee such a change takes place exactly like lightning, and illumination follows simultaneously. That is to say a devotee simultaneously changes his material body and develops a spiritual body by the will of the Supreme. Even before death, a pure devotee has no material affection, due to his body's being spiritualized like a red-hot iron in contact with fire.
(Srimad Bhagavatam----1:6:27----purport).