Jami` at-Tirmidhi 1345
جامع الترمذي#1345SahihJa'far bin Muhammad narrated from his father:"The Prophet (ﷺ) passed judgement based on an oath along with one witness." He said: "And 'Ali judged between you based on it
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Zubair Ali ZaiSahih
In-book reference: 15:25