'Imran bin Husain (RAA) narrated, 'Ya'la bin Umaiyah fought with another man. One of them bit the other man's finger and the latter (whose finger was bit) pulled his hand out of the first man's mouth (who was biting) by force, causing his incisors teeth to be pulled out. They presented their dispute to the Prophet who said, "One of you bit his brother as a male camel bites? Go and there is not Diyah for him (as a punishment for their foolishness).'Agreed upon and the wording is from Muslim.
English reference: Book 9, Hadith 1238
Arabic reference: Book 9, Hadith 1210