One fourth (of the penance) for the murder of a Brahmana is prescribed (as expiation) for (intentionally) killing a Kshatriya, one-eighth for killing a Vaisya; know that it is one-sixteenth for killing a virtuous Sudra.
Or he may perform the penance prescribed for the murderer of a Brahmana during three years, controlling himself, wearing his hair in braids, staying far away from the village, and dwelling at the root of a tree.