Jami` at-Tirmidhi 1397
جامع الترمذي#1397Sahihحَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا وَكِيعٌ، عَنِ الأَعْمَشِ، عَنْ أَبِي وَائِلٍ، عَنْ عَبْدِ اللَّهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِنَّ أَوَّلَ مَا يُقْضَى بَيْنَ الْعِبَادِ فِي الدِّمَاءِ " .
Abdullah narrated that the Messenger of Allah (ﷺ) said:"Indeed the first cases to be judged between the worshippers are those of bloodshed
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:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 16:13