Musannaf Ibn Abi Shayba 18:838

Abu Bakr narrated to us, he said: Muhammad bin Bakr narrated to us, from Ibn Jurayj, who said: I said to 'Ata': "Is the *'aql* (blood money/compensation) like the status of inheritance?" He said: "Yes." I said: "And do the maternal siblings inherit from it?" He said: "Yes."