(19) باب ائْتِمَامِ الْمَأْمُومِ بِالإِمَامِ
Anas b. Malik reported:
The Messenger of Allah (ﷺ) fell down from a horse and his right side was grazed, and the rest of the hadith is the same with the addition of these words:" When he (the Imam) says prayer standing, you should also do so." (ID)
Reference (ID): Sahih Muslim 411 c (ID)
In-book reference (ID): Book 4, Hadith 85 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 819 (ID)