It was narrated that 'Imran bin Husain said:"Ya'la fought with a man, and one of them bit the other, who pulled his hand away from his mouth, and a front tooth fell out. They referred their dispute to the Messenger of Allah and he said: 'Would one of you bite his brother as a stallion bites? There is no Diyah for that

English translation · Sunan an-Nasa'i