Sunan an-Nasa'i 1172

‘Ubayd Allah ibn Sa‘id Abu Qudamah al-Sarakhsi reported to us, saying: Yahya ibn Sa‘id reported to us; Hisham—the Dawsta’i—reported to us; he said: Qatadah narrated to me, from Yunus ibn Jubayr, from Hittan ibn ‘Abd Allah, that Abu Musa al-Ash‘ari said: The Messenger of Allah (ﷺ) addressed us, taught us our practice, and explained our prayer. He said: “Straighten your rows, then let one of you lead you. When he says the takbir, say it; and when he says, ‘Not those who have gone astray,’ say ‘Amin,’ and Allah will answer you. When the imam says the takbir and bows, say the takbir and bow, for the imam bows before you and rises before you.” The Prophet of Allah (ﷺ) said: “That corresponds to that. When he says, ‘Allah hears whoever praises Him,’ say, ‘Our Lord, to You belongs all praise’; Allah will hear you, for Allah, Mighty and Majestic, said through the tongue of His Prophet (ﷺ), ‘Allah hears whoever praises Him.’ Then, when the imam says the takbir and prostrates, say the takbir and prostrate, for the imam prostrates before you and rises before you.” The Prophet of Allah (ﷺ) said: “That corresponds to that. When it is time to sit, let the first words one of you says be: ‘All good greetings, prayers, and good things belong to Allah. Peace be upon you, O Prophet, and Allah’s mercy and blessings. Peace be upon us and upon Allah’s righteous servants. I bear witness that there is no deity worthy of worship except Allah, and I bear witness that Muhammad is His servant and Messenger.’”