Sunan Abi Dawud Book 2, Hadith 401
O mu’adh, do not become a trouble , because the aged, the weak, the needy and the traveler pray behind you.
Mu’adh b. Jabal used to pray along with the Prophet (ﷺ); then he returned and led us in prayer. Sometimes he (the narrator) said: then he returned and led his people in prayer. One night the Prophet (ﷺ) delayed the prayer. Sometimes he (the narrator) mentioned the word “the night prayer”. Then Mu’adh prayed along with the Prophet (ﷺ), then returned to his people and led them in prayer, and recited Surat al-Baqarah. A man turned aside and prayed alone. The people said to him: Have you become a hypocrite, so and so? He replied: I did not become a hypocrite. He then came to the Prophet (ﷺ) and said (to him): Messenger of Allah, Mu’adh prays along with you and then returns and leads us in prayers. We look after camels used for watering and work for by day. He came to us leading us in prayer, and he recited Surah al-Baqarah (in prayer). He (the Prophet) said: Mu’adh, are you a trouble maker? Recite such and such ; recite such and such (surahs) The narrator Abu al-Zubair said (recite) “Glorify the name of the most high lord” (surah lxxxvii) and “By the night when it covers over” (surah xcii). We mentioned this to ‘Amr. He said I think he mentioned it (the names of some surahs).
AbuSalih reported on the authority of some Companions of the Prophet (ﷺ): The Prophet (ﷺ) said to a person: what do you say in prayer?
He replied: I first recite tashahhud (supplication recited in sitting position), and then I say: O Allah, I ask Thee for Paradise, and I seek refuge in Thee from Hell-Fire, but I do not understand your sound and the sound of Mu'adh (what you say or he says in prayer). The Prophet (ﷺ) said: We too go around it (paradise and Hell-fire).