Sati is a ritual, which was followed in the ancient time of India. Sati is the burning of a widow on her husband's funeral pyre.  Certainly, the carry out is forbidden and against the law in today's India. Sati was performed among some Hindu communities by which a lately widowed woman either willingly or by of force or compulsion commits suicide.  The best-known type of sati is when a woman burns  on her husband's funeral pyre.  However, other type of sati exists, such as being buried alive with the husband's dead body.

Sati, the term derived from goddess Sati. Sati immolated herself, as she was unable to bear her father's dishonor of her husband Shiva.  Ritual of Sati was first mentioned in 510 CCE, an ancient city in state of Madhya Pradesh. According to Hindu commandment books of first century CE says the act as gaining spiritual merit, it was considered that for a woman to stay alive after her husband’s death was sinful.
It is improbable that many widows went willingly to the flames. A lot were forcibly burned. In 1829, under Lord Bentinck's Regulation, sati becomes legally murder, after forcing by Christian missionaries and Hindu reformers to British government. Raja Ram Mohan Roy took the first step from Hindu reformers.