Satī continued: If one hears an irresponsible person blaspheme the master and controller of religion, one should block his ears and go away if unable to punish him. But if one is able to kill, then one should by force cut out the blasphemer’s tongue and kill the offender, and after that one should give up his own life.
Reference Srimad-Bhagavatam 4.4.17
The great sages, thus manifesting their covert anger, immediately decided to kill the King. King Vena was already as good as dead due to his blasphemy against the Supreme Personality of Godhead. Thus without using any weapons, the sages killed King Vena simply by high-sounding words.
Srimad Bhagavatam 5.26.14-15
If a person deviates from the path of the Vedas in the absence of an emergency, the servants of Yamarāja put him into the hell called Asi-patravana, where they beat him with whips. When he runs hither and thither, fleeing from the extreme pain, on all sides he runs into palm trees with leaves like sharpened swords. Thus injured all over his body and fainting at every step, he cries out, “Oh, what shall I do now! How shall I be saved!” This is how one suffers who deviates from the accepted religious principles.
Srimad Bhagavatam 4.14.30-35
in the Blasphemy category where Brahmins killed King Vena for blaspheming Vishnu.
Skanda Purana Book 7 Section 1 Chapter 3 Verse 144 Thus the foolish ones will say. Others will laugh. The non-believers, the people destined to fall into hell, get their minds overwhelmed by sins. At the advent of Kali Age, they will never gain Siddhi.
According to Hinduism atheists go to hell
Buddhists will also go to hell according to below hindu texts
📖Srimad Devi Bhagavatam 11.1.25-37
Tantra is accepted as the authoritative proof then and then only when it contradicts not the Vedas. Whatever goes clearly against the Vedas can in no way be accepted as a proof. In matters concerning Dharma, the Vedas is the Sole Proof. Therefore that which is not against the Vedas can be taken as proof; otherwise not. Whoever acts Dharma according to other proofs than what is ordained in the Vedas, goes to the hell in the abode of Yama to get his lesson. So the Dharma that is by all means to be accepted as such, is what is stated in the Vedas. The Smritis, the Puranas, or the Tantra Śāstras can be taken also as authoritative when they are not conflicting to Vedas. Any other Sastras can be taken as authoritative when it is fundamentally coincident with the Vedas. Else it can never be accepted. Those who do injury to others even by the blade of a Kuśa grass used as a weapon, go to hell with their heads downwards and their feet upwards. Those that follow their own sweet free will, that take up any sort of dress (e. g. Bauddhas), those that follow the philosophical doctrines called Pasupatas, and the other hermits and saints and persons that take up other vows contrary to the religions of the Vedas, for example, the Vaikhānasa followers, those who brand their bodies by the hot Mudras, at the places of pilgrimages, e. g. Dvarka, etc., they go to hell with their bodies scorched by red hot brands (Tapta Mudrās). So persons should act according to the excellent religions commanded by the Vedas.
apostasy punishment in Hinduism
Narada Purana, Uttarabhaga 21.38 “These persons are to be punished and given capital punishment- he who eschews Visnu the foremost among the gods and worships any other deity…” Tr. G.V. Tagare
Srimad Bhagavatam 5.26.14-15
He that, even when no danger threatens, forsakes the path prescribed by the Vedas and follows that of a heretic, is thrown by the servants of Yama into the hellish region named Asipatravana
There are some examples where demons devoted to Devas were killed soon after they left the Vedic religion and embraced other religions like Buddhism and Jainism. There is a story of the sons of Raji being killed by Indra after Brihaspati deludes them to leave the Vedic religion and converts them to Jainism.
Matysa Purana 24.47-49 “…Brihaspati then went and deluded the other sons of Raji with false philosophy and established the Jina religion opposed to the Vedas, though himself a knower of the Vedas and Indra on finding the sons of Brihaspati propagating a religion different from the Vedas based on a show of reason only killed them with his mighty thunderbolt.” Tr. Taluqdar of Oudh, edited by B.D. Basu
Punishment for blasphemy against the Trimurti in Hinduism, It means if anyone insults Hindu Gods then they should be killed, many other verses related to Apostasy in Hinduism are also mentioned in their different holy books.
- Reference Srimad-Bhagavatam 4.4.17
- Reference Srimad-Bhagavatam 4.14.30-34
- Reference Srimad Bhagavatam 5.26.14-15
- Reference Srimad Bhagavatam 4.14.30-35
- Reference Skanda Purana Book 7 Section 1 Chapter 3 Verse 144
- Reference : Srimad Bhagavatam Book 5 Section 3 Chapter 227 Verse 1-10
- Reference : Srimad Devi Bhagavatam 11.1.25-37