Musannaf Ibn Abi Shaybah 3565 — Straightening the row

Sayyiduna Abu Mas'ud (may Allah be pleased with him) said: In the prayer the Messenger of Allah (peace and blessings be upon him) would touch our shoulders to straighten the rows, and he would say: "Keep the rows straight and do not stand unevenly, or else Allah Almighty will put discord into your hearts. Let those of you who have intelligence and understanding stand closest to me in the prayer, and after them those who are below them in understanding." Sayyiduna Abu Mas'ud said: "Today there is much more discord among you."