Sahih al-Bukhari, Hadith 1848

A man bit the hand of another man but in that process the latter broke one incisor tooth of the former, and the Prophet forgave the latter.

وَعَضَّ رَجُلٌ يَدَ رَجُلٍ ـ يَعْنِي فَانْتَزَعَ ثَنِيَّتَهُ ـ فَأَبْطَلَهُ النَّبِيُّ صلى الله عليه وسلم‏.‏

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