Jami` at-Tirmidhi 1362
جامع الترمذي#1362SahihNarrated Al-Bara':"My maternal uncle Abu Burdah Ibn Niyar passed by me and he had a flag with him. I said: 'Where are you going ?' He said: 'the Messenger of Allah (ﷺ) dispatched me to a man who married a woman his father had married to: that I should bring him his head
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 15:42