Mbh 12.165.1f

No one, therefore, should speak ill of a Brahmana or slay him. If a person strikes a Brahmana with a weapon, he will have to live in hell for as many years as the grains of dust that are soaked by the blood flowing from the wounded. One guilty of foeticide becomes cleansed if he dies of wounds received in battle fought for the sake of kine and Brahmanas. He may also be cleansed by casting his person on a blazing fire.[476] A drinker of alcoholic liquors becomes cleansed by drinking hot alcohol. His body being burnt with that hot drink, he is cleansed through death in the other world.[477] A Brahmana stained by such a sin obtains regions of felicity by such a course and not by any other. For violating the bed of a preceptor, the wicked-souled and sinful wretch becomes cleansed by the death that results from embracing a heated female figure of iron. Or, cutting off his organ and testicles and bearing them in his hands, he should go on in a straight course towards the south-west and then cast off his life. Or, by meeting with death for the sake of benefiting a Brahmana, he may wash off his sin. Or, after performing a horse-sacrifice or a cow-sacrifice or an Agnishtoma, he may regain esteem both here and hereafter. The slayer of a Brahmana should practise the vow of Brahmacharya for twelve years and devoting himself to penances, wander, holding in his hands the skull of the slain all the time and proclaiming his sin unto all. He should even adopt such a course, devoted to penance and leading the life of an ascetic. Even such is the expiation provided for one who slays a woman quick with child, knowing her condition. The man who knowingly slays such a woman incurs double the sin that follows from Brahmanicide. A drinker of alcoholic liquor should live on frugal fare, practising Brahmacharya vows, and sleep on the bare ground, and perform, for more than three years the sacrifice next to the Agnishtoma.