Sunan Ibn Majah 962
سنن ابن ماجه#962SahihIt was narrated that Abu Musa said:“The Messenger of Allah (ﷺ) said: ‘I have gained weight, so when I bow, then bow, and when I stand up, then stand up, and when I prostrate, then prostrate. I should never find anyone preceding me in bowing or prostration.’”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih Lighairihi
Zubair Ali ZaiSahih
In-book reference: 5:160