Sunan an-Nasa'i, Volume 5, Book 45, Hadith 4766 (DarusSalam) ⓘ
It was narrated from 'Imran bin Husain that: a man bit another man in the forearm, and his front tooth fell out, so he went to the Prophet and told him about that. He said: "Do you want to bite your brother's forearm as a stallion bites?" And he judged it to be invalid.
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ الْمُبَارَكِ، قَالَ حَدَّثَنَا أَبُو هِشَامٍ، قَالَ حَدَّثَنَا أَبَانُ، قَالَ حَدَّثَنَا قَتَادَةُ، قَالَ حَدَّثَنَا زُرَارَةُ بْنُ أَوْفَى، عَنْ عِمْرَانَ بْنِ حُصَيْنٍ، أَنَّ رَجُلاً، عَضَّ ذِرَاعَ رَجُلٍ فَانْتَزَعَ ثَنِيَّتَهُ فَانْطَلَقَ إِلَى النَّبِيِّ صلى الله عليه وسلم فَذَكَرَ ذَلِكَ لَهُ فَقَالَ " أَرَدْتَ أَنْ تَقْضَمَ ذِرَاعَ أَخِيكَ كَمَا يَقْضَمُ الْفَحْلُ " . فَأَبْطَلَهَا .
also referenced under: Hadith 4762 (Reference) & Book 45, Hadith 57 (In-Book)