Abu Dawud
Types Of Blood Wit
Book Number: 034 / Hadith Number: 4491
Narated By Abdullah ibn Amr ibn al-'As : The Prophet (pbuh) said: A believer will not be killed for an infidel. If anyone kills a man deliberately, he is to be handed over to the relatives of the one who has been killed. If they wish, they may kill, but if they wish, they may accept blood-wit.