Sunan an-Nasa'i 3474
سنن النسائي#3474SahihIt was narrated that Sa'eed bin Jubair said:"Al-Mus'ab did not separate the two who engaged in Li'an." Sa'eed said: "I mentioned that to Ibn 'Umar and he said: 'The Messenger of Allah separated the couple from Banu 'Ajlan
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 27:86