Uthman · The Book of Prayers

The Apostle of Allah (ﷺ) said to him: Lead your people in prayer. I said: Messenger of Allah. I perceive something (disturbing) in my soul. He (the Holy Prophet) asked me to draw near him and making me sit down in front of him he placed his hand on my breast between my nipples. and then, telling me to turn round, he placed it on my back between my shoulders. He then said: Act as an Imam for your people.…

The last thing which the Messenger of Allah (ﷺ) instructed me was: When you lead the people in prayer, be brief.