Hadith 790:48
'Abd al-Razzaq narrated to us, Ma'mar narrated to us, from Ayyub, from Ibn Sirin, from 'Imran ibn Husayn, who said: A man bit another man, and his front tooth was pulled out. The Prophet, peace and blessings of Allah be upon him, declared it void (i.e., no blood money or retaliation), and said: "Do you want to gnaw the hand of your brother as a stallion gnaws?"
حدثنا عبد الرزاق، حدثنا معمر، عن أيوب، عن ابن سيرين، عن عمران بن حصين قال: عض رجل رجلا فانتزعت ثنيته، فأبطلها النبي صلى الله عليه وسلم وقال: " أردت أن تقضم يد أخيك، كما يقضم الفحل "