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.
Reference: Sunan an-Nasa'i 4763 In-book : Book 45, Hadith 58 English translation : Vol. 5, Book 45, Hadith 4767
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