Sayyiduna Ya'la (may Allah be pleased with him) narrates: I travelled with the Prophet (peace and blessings be upon him) in the Expedition of Tabuk on an unruly camel, and I had a hired worker of mine with me. My worker fought with a man; that man bit him, so the worker pulled his hand out of his mouth, and his tooth fell out. He was brought to the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said to him: "Should he leave his hand in your mouth for you to chew it as a male camel chews?" And he (peace and blessings be upon him) declared that tooth forfeit.
Hadith Referenceالمعجم الكبير للطبراني / باب الياء / 18870