Mahapatakas
Mahapatakas are five great sins that are mentioned in Hindu texts.
Cycle of birth and death
As per Hindu texts, every action of a living being leads to a reaction and an associated result, which forms the concept of karma. Every transgression, or demerit, signifying deeds or intentions that transgress moral and spiritual laws, results in negative karma called pāpa, while good deeds earn punya. As per Bhagavad Gita, a atman spends time in the svarga for the good deeds and is cast back into earth to take a life form. As long as sins are committed, the cycle of rebirth continues.
Sins
Manusmriti mentions the five greatest sins :
There are other activities which are mentioned as equivalent to committing these five great sins. Murdering a menstruating or pregnant woman, killing of a kshatriya or one who has given a sacrifice, causing harm to one who has sought refuge and endangering a child or causing an abortion are considered equivalent to Brahmahatya. Betraying a friend is considered equivalent to consuming intoxicating substances. Embezzling land and property of Brahmins, and stealing certain items such as horses, jewellery are considered equivalent to steya. Indulging in a incestuous relationship with an elder or friend's spouse is considered equivalent to guruvanganagama.
Punishment and atonement
The Hindu texts mention various punishments for various sins, apart from suffering in naraka in the afterlife and subsequent rebirth. However, there were differences in terms of the quantum and application of punishments based on the varnas. One has to either feel remorse or atone for the sins committed. Texts also give various means by which one can atone for the sins committed. These include public confession, prayer to god and chanting mantras, visiting pilgrimage sites and taking holy dip in sacred rivers, performing rituals, austere living and virtuous conduct, attaining knowledge, self control and meditation, obtaining blessings of saints, gurus or elders, and giving charity.