Musannaf Ibn Abi Shayba 18:572

Abu Bakr narrated to us, he said: Isma'il ibn 'Ayyash narrated to us, from 'Ubayd Allah ibn 'Ubayd al-Kala'i, from Makhul, he said: Retaliation (qisas) is not taken for the *ja'ifah* (a wound that reaches the body cavity), the *ma'mumah* (a head wound that reaches the membrane of the brain), the *munqilah* (a wound that dislocates bones), and the *nakhirah* (a wound that reaches the bone).