It was narrated from Ya'la bin Munyah that: he fought a man and one of them bit the other, who pulled his forearm away from his mouth, and a front tooth fell out. The matter was referred to the Prophet and he said: Would one of you bite his brother as a young camel bites? And judged it to be invalid.
It was narrated from Ya'la bin Munyah that: a man from Banu Tamim fought with another man, and he bit his hand, so he pulled it away and a front tooth fell out. They referred the dispute to the Messenger of Allah, who said: Would one of you bite his brother as a young camel bites? and he thwarted it, meaning he judged it to be invalid.