Chapter: If a person stands by the left side of the Imam, and the Imam dress him to the right from behind, the Salat (prayer) is correct.

I prayed with the Prophet (ﷺ) one night and stood on his left side. Allah's Messenger (ﷺ) caught hold of my head from behind and drew me to his right and then offered the prayer and slept. Later the Mu'adh-dhin came and the Prophet (ﷺ) stood up for prayer without performing ablution.