Sunan an-Nasa'i 1280

Muhammad ibn Bashshar narrated to us: Yahya ibn Sa‘id narrated to us, from Hisham, from Qatadah. Another chain: Muhammad ibn al-Muthanna narrated to us: Yahya narrated to us; Hisham narrated to us, saying: Qatadah narrated to us, from Yunus ibn Jubayr, from Hittan ibn ‘Abd Allah, that al-Ash‘ari said: The Messenger of Allah (ﷺ) addressed us, taught us our Sunnah, and explained our prayer to us. He said: “When you stand for prayer, straighten your rows, then let one of you lead you. When he says the takbir, say the takbir; and when he says, ‘not those who went astray’ [wa la al-dallin], say ‘Amin’; Allah will answer you. Then, when he 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 is offset by this. When he says, ‘Allah hears the one who praises Him,’ say, ‘O Allah, our Lord, to You belongs all praise,’ for Allah, Mighty and Sublime, has said on the tongue of His Prophet (ﷺ), ‘Allah hears the one who praises Him.’ Then, when he 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 is offset by this. When you are seated, let these words be among what one of you says: ‘All greetings, good words, and prayers belong to Allah. Peace be upon you, O Prophet, and the mercy of Allah and His blessings. Peace be upon us and upon Allah’s righteous servants. I bear witness that there is no deity but Allah, and I bear witness that Muhammad is His servant and messenger.’”