The Oath of Qasama
Malik :: Book 44 : Hadith 44.3.2
Yahya said that Malik said, "The way of doing things in our community about Yahya said that Malik said, "The procedure in swearing in manslaughter is that those who claim blood swear and it becomes due by their swearing. They swear fifty oaths, and there is blood-money for them according to the division of their inheritances. If it is not possible to divide up the oaths which they swear between them evenly, one looks to the one who has most of those oaths against him, and that oath is obliged against him."
Malik said, "If the slain man only has female heirs, they swear and take the blood-money. If he only has one male heir, he swears fifty oaths and takes the blood-money. That is only in the accidental killing, not in the intentional one."