37:165As-Saaffaat

(He was not a liar) We used to pray behind the Prophet (ﷺ) and when he said, "Sami`a l-lahu liman hamidah", none of us would bend his back (to go for prostration) till the Prophet (ﷺ) had placed his, forehead on the ground.

"We witnessed the fear prayer with the Messenger of Allah (ﷺ). We stood behind him in two rows, and the enemy was between us and the Qiblah. The Messenger of Allah (ﷺ) said the takbir. He bowed and we bowed, and he stood up again and we stood up. When he went down in prostration, the Messenger of Allah (ﷺ) and those who were closest to him prostrated, and the second row remained standing until the Messenger of Allah (ﷺ) and the row closest to him stood up. Then the second row prostrated when the Messenger of Allah (ﷺ) had stood up, where they were. Then the row that had been closest to the Prophet (ﷺ) moved back and the second row moved forward, each standing in the place where the other had been. The Prophet (ﷺ) bowed and we bowed, then he stood up and we stood up, and when he went down in prostration, those who were closest to him prostrated and the others remained standing. When the Messenger of Allah (ﷺ) and those who were closest to him sat up, the others prostrated, then he said the taslim."

The Messenger of Allah (ﷺ) used to straighten our rows when we stood up to pray, and when we were straight, he said: Allah is most great (takbir).

we stood for praying at Mina when the Imam had not come out. Some of us sat down (and I too). An old man from Kufah said to me: Why did you down? I said : Ibn Buraidah, this is Sumud (i.e., waiting for the Imam in the standing condition). The old man then narrated a tradition from ‘Abd al-Rahman b. ‘Awaajah on the authority of al-Bara’ b. ‘Azib: We would stand in rows during the time of the Messenger of Allah (ﷺ) for a long time before he pronounced Takbir. He further said; Allah, the Exalted and Mighty, sends blessings and the angles invoke blessings for those who are nearer to the front rows. No step is more liking to Allah than a step which one takes to join the row (of the prayer).

“We set out until we came to the Prophet (ﷺ). We gave him our oath of allegiance and performed prayer behind him. Then we offered another prayer behind him. He finished the prayer and saw a man on his own, praying behind the row.” He said: “The Prophet of Allah (ﷺ) stood beside him and when he finished he said: ‘Repeat your prayer; there is no prayer for the one who is behind the row.’”