From Sahih Muslim (Hadith 1368):
Abu Salama reported Abu Huraira as saying:Iqama was pronounced. ant the people had formed themselves into rows. The Messenger of Allah (ﷺ) came out and stood at his place, and then pointed out with his hand that we should stand at our places. He then went away and took a bath and water trickled from his head and then led them in prayer
Reference: Muslim 1368