Yahya related to me from Malik that Ibn Shihab said, "Theprecedent of the sunna is that the tribe are not liable for any blood-money of an intentional killing unless they wish that."Yahyarelated to me from Malik from Yahya ibn Said the same as that.
USC-MSA web (English) reference: Book 43, Hadith 8
Arabic reference: Book 43, Hadith 1585