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. (Using translation from Nasāʾī 4764)
أَنَّ رَجُلًا مِنْ بَنِي تَمِيمٍ قَاتَلَ رَجُلًا فَعَضَّ يَدَهُ فَانْتَزَعَهَا فَأَلْقَى ثَنِيَّتَهُ فَاخْتَصَمَا إِلَى رَسُولِ اللهِ ﷺ فَقَالَ «يَعَضُّ أَحَدُكُمْ أَخَاهُ كَمَا يَعَضُّ الْبَكْرُ» فَأَطَلَّهَا أَيْ أَبْطَلَهَا