Sunan an-Nasa'i 1084
سنن النسائي#1084SahihIt was narrated that Abu Bushr said:"I heard Yusuf-meaning Ibn Mahak- narrating that Hakim said: 'I gave my pledge of allegiance to the Messenger of Allah (ﷺ), pledging that I would go down (in prostration) only after standing up from bowing
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 ZaiIsnaad Sahih
In-book reference: 12:56