Jami` at-Tirmidhi 1416
جامع الترمذي#1416SahihNarrated 'Imran bin Husain:"A man bit the hand of another man. The man who was bitten pulled his hand out, causing two of his incisors (teeth) to fall out. They brought their case of the Prophet (ﷺ). So he said: "One of you bites his brother like the stallion bites? There is no blood-money for you.' So Allah Most High revealed: Wounds, equal for equal
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 16:32