question #1 Sahih Muslim 605c, Book 5, Hadith 203 : What is the significance of forming rows before the prayer leader stands up in Islamic congregational prayers?

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.