question #2 Sahih Muslim 605c, Book 5, Hadith 203 : How does the practice of arranging in rows before the prayer leader begins reflect discipline in Islamic prayer?

Abu Salama reported on the authority of Abu Huraira that when Iqama was pronounced for the Messenger of Allah (ﷺ), the people occupied their places in the rows before the Messenger of Allah (way peace be upon him) stood up at his place.