Musannaf Ibn Abi Shayba 18:931

Abu Bakr narrated to us, he said: Hafs narrated to us, from al-Shaybani, from Muhammad ibn Ubayd Allah, from Shurayh, regarding a man who bit another man, so he pulled away and his incisor tooth was pulled out; Shurayh declared it void (i.e., ruled that there was no compensation for it).