Sunan an-Nasa'i 4766
سنن النسائي#4766Sahihأَخْبَرَنَا عَبْدُ الْجَبَّارِ بْنُ الْعَلاَءِ بْنِ عَبْدِ الْجَبَّارِ، عَنْ سُفْيَانَ، عَنْ عَمْرٍو، عَنْ عَطَاءٍ، عَنْ صَفْوَانَ بْنِ يَعْلَى، عَنْ أَبِيهِ، أَنَّ رَجُلاً، عَضَّ يَدَ رَجُلٍ فَانْتُزِعَتْ ثَنِيَّتُهُ فَأَتَى النَّبِيَّ صلى الله عليه وسلم فَأَهْدَرَهَا .
It was narrated from Safwan bin Ya'la, from his father, that:a man bit the hand of another man and his front tooth fell out. He came to the Prophet but he considered it in vain
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu Ghuddah-
Zubair Ali ZaiSahih
In-book reference: 45:61