Sunan an-Nasa'i 1494
سنن النسائي#1494SahihIt was narrated from Aishah that:The Messenger of Allah (ﷺ) prayed, bowing four times, and he recited loudly, and every time he raised his head he said: "Sami Allahu liman hamidah. Rabbana wa lakal-hamd (Allah hears those who praise Him, Our Lord to You be praise)
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 - Agreed Upon
In-book reference: 16:36