Bulugh al-Maram, Book 9, Hadith 1231 (English) ⓘ

A man from the Ansar narrated that The Messenger of Allah consented to the Qasamah (taking an oath that they did not kill the victim), which was practiced during the time of Jahiliyah (pre-Islam) and the Messenger of Allah made a judgment between some men from the Ansar concerning a man who was killed and they claimed that the Jews had killed him.’ Related by Muslim.

وَعَنْ رَجُلٍ مِنْ اَلْأَنْصَارِ; { أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-أَقَرَّ اَلْقَسَامَةَ عَلَى مَا كَانَتْ عَلَيْهِ فِي اَلْجَاهِلِيَّةِ, وَقَضَى بِهَا رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-بَيْنَ نَاسٍ مِنَ اَلْأَنْصَارِ فِي قَتِيلٍ اِدَّعَوْهُ عَلَى اَلْيَهُودِ } رَوَاهُ مُسْلِمٌ.‏ 1‏ ‏1 ‏- صحيح.‏ رواه مسلم (1670)‏، وهما عنده روايتان جمعهما الحافظ هنا.‏