Sunan an-Nasa'i 1235
سنن النسائي#1235SahihIt was narrated from Abu Hurairah that :The Prophet (ﷺ) prostrated after the salam when he was not sure
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih Isnaad
Al-AlbaniSahih Isnaad
Zubair Ali ZaiSahih
In-book reference: 13:57