(91) باب رَفْعِ الْبَصَرِ إِلَى الإِمَامِ فِي الصَّلاَةِ
Narrated Al-Bara:
(And Al-Bara was not a liar) Whenever we offered prayer with the Prophet (ﷺ) and he raised his head from the bowing, we used to remain standing till we saw him prostrating .
Reference: Sahih al-Bukhari 747
In-book reference: Book 10, Hadith 141
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 12, Hadith 714