Abu Salama reported on the authority of Abu Hurairah (RA) that when Iqama was pronounced for the Messenger of Allah (ﷺ) , the people occupied their places in the rows before the Apostle of Allah (ﷺ) stood up at his place.
Shaykh Maulana Abdul Aziz Alvi
Hadith Commentary: Benefits and Issues: From the hadith of Abu Hurairah (radi Allahu anhu), it becomes absolutely clear that upon the Prophet’s (sallallahu alayhi wa sallam) exit from his chamber, as soon as the takbir was pronounced, people would begin to stand up, and by the time the Prophet (sallallahu alayhi wa sallam) arrived at his prayer place (musalla), the rows had already been formed.
Source: Tuhfat al-Muslim: Commentary on Sahih Muslim, Page: 1369