Musannaf Ibn Abi Shayba 18:134

Abu Bakr narrated to us, he said: Muhammad ibn Bakr narrated to us, from Ibn Jurayj, from Ibn Abi Najih, from Mujahid, that he used to say regarding the *ja'ifah* (a wound that reaches the interior of a cavity) of the nose: "One-third of the blood money." "And if it penetrates through, then two-thirds."