Sunan an-Nasa'i 4761
سنن النسائي#4761Sahihأَخْبَرَنَا سُوَيْدُ بْنُ نَصْرٍ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ شُعْبَةَ، عَنْ قَتَادَةَ، عَنْ زُرَارَةَ، عَنْ عِمْرَانَ بْنِ حُصَيْنٍ، أَنَّ يَعْلَى، قَالَ فِي الَّذِي عَضَّ فَنَدَرَتْ ثَنِيَّتُهُ أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " لاَ دِيَةَ لَكَ " .
It was narrated from 'Imran bin Husain that:Ya'la said, concerning the one who bit (another), and his front tooth fell out, that the Prophet said: "There is no Diyah for you." (Sahih)
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 GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 45:56