Musannaf Ibn Abi Shayba 26:300

Waki’ narrated to us, he said: Sufyan narrated to us, from Mughira, from Ibrahim, who said: The son of the woman involved in *li’an* (mutual imprecation), his *‘asaba* (agnatic kin) are the *‘asaba* of his mother; they inherit from him and pay his blood money (*diya*) on his behalf.