“We went out with the Messenger of Allah ﷺ on the military expedition of Tabuk, and with us was a friend of ours. He fought with another man while we were on the road. The man bit the hand on his opponent, who pulled away his hand and the man's tooth fell out. He came to Messenger of Allah ﷺ demanding compensatory money for his tooth, and the Messenger of Allah ﷺ said: 'Would anyone of you go and bite his brother like a stallion, then come demanding compensatory money? There is no compensatory for this.'” Hence, The Messenger of Allah ﷺ invalidated it (i.e compensatory in such case).  

عَنْ عَمَّيْهِ يَعْلَى وَسَلَمَةَ ابْنَىْ أُمَيَّةَ قَالاَ خَرَجْنَا مَعَ رَسُولِ اللَّهِ ﷺ فِي غَزْوَةِ تَبُوكَ وَمَعَنَا صَاحِبٌ لَنَا فَاقْتَتَلَ هُوَ وَرَجُلٌ آخَرُ وَنَحْنُ بِالطَّرِيقِ قَالَ فَعَضَّ الرَّجُلُ يَدَ صَاحِبِهِ فَجَذَبَ صَاحِبُهُ يَدَهُ مِنْ فِيهِ فَطَرَحَ ثَنِيَّتَهُ فَأَتَى رَسُولَ اللَّهِ ﷺ يَلْتَمِسُ عَقْلَ ثَنِيَّتِهِ فَقَالَ رَسُولُ اللَّهِ ﷺ يَعْمِدُ أَحَدُكُمْ إِلَى أَخِيهِ فَيَعَضُّهُ كَعِضَاضِ الْفَحْلِ ثُمَّ يَأْتِي يَلْتَمِسُ الْعَقْلَ لاَ عَقْلَ لَهَا قَالَ فَأَبْطَلَهَا رَسُولُ اللَّهِ ﷺ  

man bit another man on his forearm; he pulled away his arm away and the man’s tooth fell out. The matter was referred to Prophet ﷺ who invalidated it and said: 'Would one of you bite (another) like a stallion?'”  

أَنَّ رَجُلاً عَضَّ رَجُلاً عَلَى ذِرَاعِهِ فَنَزَعَ يَدَهُ فَوَقَعَتْ ثَنِيَّتُهُ فَرُفِعَ إِلَى النَّبِيِّ ﷺ فَأَبْطَلَهَا وَقَالَ يَقْضَمُ أَحَدُكُمْ كَمَا يَقْضَمُ الْفَحْلُ