Messenger of Allah ﷺ fell from a horse and got injured so he led the prayer sitting and we also prayed sitting. When he completed the prayer he said, "The Imam is to be followed; if he says Takbir then say Takbir, bow if he bows; raise your heads when he raises his head, when he says, 'Samiʿa l-lahu liman hamidah say, 'Rabbana laka l-hamd', and prostrate when he prostrates."  

أَنَّهُ قَالَ خَرَّ رَسُولُ اللَّهِ ﷺ عَنْ فَرَسٍ فَجُحِشَ فَصَلَّى لَنَا قَاعِدًا فَصَلَّيْنَا مَعَهُ قُعُودًا ثُمَّ انْصَرَفَ فَقَالَ إِنَّمَا الإِمَامُ أَوْ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَارْفَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا لَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا  

"Abu Musa led us in prayer and when he was sitting, a man from among the people entered and said: 'Prayer is based on righteousness and is always mentioned alongside Zakah (in the Qur'an).' When Abu Musa had said the Salam, he turned to the people and said: 'Which of you spoke these words?' The people kept quiet. Then he said: 'O Hittan, perhaps you said it?' He said: 'No, but I was afraid that you would rebuke me for it.' He said: 'The Messenger of Allah ﷺ taught us our prayer and Sunnah prayers, and he said: The Imam is appointed to be followed, so when he says the Takbir, say the Takbir; when he says "Not (the way) of those who earned Your Anger, nor of those who went astray," say Amin, and Allah will respond to you; when he rises up from bowing and says, 'Sami' Allalhu liman hamidah (Allah hears those who praise Him), say 'Rabbana lakal-hamd (Our Lord, to You be praise),' and Allah will hear you; when he prostrates, prostrate, and when he sits up, sit up. The Imam should prostrate before you do and sit up before you do.' The Messenger of Allah ﷺ said: 'This makes up for that.'"  

صَلَّى بِنَا أَبُو مُوسَى فَلَمَّا كَانَ فِي الْقَعْدَةِ دَخَلَ رَجُلٌ مِنَ الْقَوْمِ فَقَالَ أُقِرَّتِ الصَّلاَةُ بِالْبِرِّ وَالزَّكَاةِ فَلَمَّا سَلَّمَ أَبُو مُوسَى أَقْبَلَ عَلَى الْقَوْمِ فَقَالَ أَيُّكُمُ الْقَائِلُ هَذِهِ الْكَلِمَةَ فَأَرَمَّ الْقَوْمُ قَالَ يَا حِطَّانُ لَعَلَّكَ قُلْتَهَا قَالَ لاَ وَقَدْ خَشِيتُ أَنْ تَبْكَعَنِي بِهَا فَقَالَ إِنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُعَلِّمُنَا صَلاَتَنَا وَسُنَّتَنَا فَقَالَ إِنَّمَا الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَالَ { غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلاَ الضَّالِّينَ } فَقُولُوا آمِينَ يُجِبْكُمُ اللَّهُ وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَقَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا لَكَ الْحَمْدُ يَسْمَعِ اللَّهُ لَكُمْ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا رَفَعَ فَارْفَعُوا فَإِنَّ الإِمَامَ يَسْجُدُ قَبْلَكُمْ وَيَرْفَعُ قَبْلَكُمْ قَالَ رَسُولُ اللَّهِ ﷺ فَتِلْكَ بِتِلْكَ  

“The Messenger of Allah ﷺ said: ‘The Imam has been appointed to be followed, so when he says Allahu Akbar, then say Allahu Akbar, when he recites, then listen attentively; when he says: Not (the way) of those who earned Your anger, nor of those who went astray,[1:7] then say Amin; when he bows then bow; when he says Sami’ Allahu liman hamidah (Allah hears those who praise Him), then say Allahumma Rabbana wa lakal-hamd (O Allah, our Lord, to You is the praise);” when he prostrates then prostrate; and if he prays sitting down then all of you pray sitting down.’”  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَرَأَ فَأَنْصِتُوا وَإِذَا قَالَ {غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلاَ الضَّالِّينَ} فَقُولُوا آمِينَ وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا وَلَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعِينَ  

[Machine] The Messenger of Allah ﷺ used to teach us not to precede the imam in bowing and prostration. And when he (the imam) says "Allahu Akbar" (Allah is the Greatest), say "Allahu Akbar". And when he (the imam) prostrates, prostrate. And when he recites the verse "Not (the way) of those who incurred wrath upon themselves, nor of those who went astray" [Al-Fatiha 7], say "Ameen" (O Allah, accept our prayers), for when the words of the angels coincide with these words, the sins of those in the mosque are forgiven. And when he (the imam) says, "Allah hears whoever praises Him," say "Our Lord, to You belongs all praise."  

كَانَ رَسُولُ اللهِ ﷺ يُعَلِّمُنَا أَنْ لَا نُبَادِرَ الْإِمَامَ بِالرُّكُوعِ وَالسُّجُودِ وَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا قَالَ {غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلَا الضَّالِّينَ} [الفاتحة 7] فَقُولُوا آمِينَ فَإِنَّهُ إِذَا وَافَقَ كَلَامَ الْمَلَائِكَةِ غُفِرَ لِمَنْ فِي الْمَسْجِدِ وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا لَكَ الْحَمْدُ  

[Machine] The Messenger of Allah ﷺ taught us our prayers and Sunnahs, and he said, "Indeed, the imam is to be followed. So when he says 'Allahu Akbar,' say 'Allahu Akbar,' and when he says, 'not of those who have evoked [Your] anger or of those who are astray' [Al-Fatiha 7], say 'Ameen,' as Allah, the Most High, will answer your supplication. And when he bows, bow, and when he raises his head, raise yours, and when he says, 'Allah hears whoever praises Him,' say, 'Our Lord, to You is all praise,' as Allah hears you. And when he prostrates, prostrate, and when he raises his head, raise yours. Indeed, the imam prostrates before you and raises before you." The Messenger of Allah ﷺ said, "So do, as such is done."  

عَلَّمَنَا رَسُولُ اللهِ ﷺ صَلَاتَنَا وَسُنَّتَنَا فَقَالَ إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَالَ {غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلَا الضَّالِّينَ} [الفاتحة 7] فَقُولُوا آمِينَ يُجِبْكُمُ اللهُ تَعَالَى وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَارْفَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا لَكَ الْحَمْدُ يَسْمَعِ اللهُ لَكُمْ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا رَفَعَ فَارْفَعُوا؛ فَإِنَّ الْإِمَامَيَسْجُدُ قَبْلَكُمْ وَيَرْفَعُ قَبْلَكُمْ قَالَ رَسُولُ اللهِ ﷺ فَتِلْكَ بِتِلْكَ  

[Machine] He said, "Indeed, the Messenger of Allah ﷺ delivered a sermon to us and taught us our prayers and Sunnah. He said, 'I reckon that he said, "When the prayer is established, one of you should lead the prayer. When he says 'Allahu Akbar' (Allah is the Greatest), then say 'Allahu Akbar' too. And when he recites 'Not of those who have evoked [Your] anger or of those who are astray' [Surah Al-Fatiha, verse 7], then say 'Ameen,' for Allah will respond to you. And when he says 'Allahu Akbar' and bows, then say 'Allahu Akbar' and bow too, for indeed, the Imam bows before you and raises before you." The Prophet ﷺ said, 'And this is like that.' And when he says 'Allah hears whoever praises Him,' then say 'Our Lord, to You is the praise.' Or he said, 'Our Lord, to You is the praise.' For indeed, Allah, the Almighty and Majestic, said on the tongue of His Prophet, 'Allah hears whoever praises Him.'"  

أَنَّهُ قَالَ إِنَّ رَسُولَ اللَّهِ ﷺ خَطَبَنَا فَعَلَّمَنَا صَلَاتَنَا وَسَنَّ لَنَا سُنَّتَنَا قَالَ أَحْسَبُهُ قَالَ إِذَا أُقِيمَتِ الصَّلَاةُ فَلْيَؤُمَّكُمْ أَحَدُكُمْ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَالَ {غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلَا الضَّالِّينَ} [الفاتحة 7] فَقُولُوا آمِينَ يُجِبْكُمُ اللَّهُ وَإِذَا كَبَّرَ وَرَكَعَ فَكَبِّرُوا وَارْكَعُوا فَإِنَّ الْإِمَامَ يَرْكَعُ قَبْلَكُمْ وَيَرْفَعُ قَبْلَكُمْ قَالَ نَبِيُّ اللَّهِ ﷺ فَتِلْكَ بِتِلْكَ وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ أَوْ قَالَ رَبَّنَا لَكَ الْحَمْدُ فَإِنَّ اللَّهَ ﷻ قَالَ عَلَى لِسَانِ نَبِيِّهِ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ  

"Abu Musa led us in prayer and when he was sitting, a man from among the people entered and said: 'Prayer is based on righteousness and is always mentioned alongside Zakah (in the Qur'an).' When Abu Musa had said the Salam, he turned to the people and said: 'Which of you spoke these words?' The people kept quiet. Then he said: 'O Hittan, perhaps you said it?' He said: 'No, but I was afraid that you would rebuke me for it.' He said: 'The Messenger of Allah ﷺ taught us our prayer and Sunnah prayers, and he said: The Imam is appointed to be followed, so when he says the Takbir, say the Takbir; when he says "Not (the way) of those who earned Your Anger, nor of those who went astray," say Amin, and Allah will respond to you; when he rises up from bowing and says, 'Sami' Allalhu liman hamidah (Allah hears those who praise Him), say 'Rabbana lakal-hamd (Our Lord, to You be praise),' and Allah will hear you; when he prostrates, prostrate, and when he sits up, sit up. The Imam should prostrate before you do and sit up before you do.' The Messenger of Allah ﷺ said: 'This makes up for that.'" (Using translation from Nasāʾī 830)  

رَجُلٌ مِنَ الْقَوْمِ أُقِرَّتِ الصَّلَاةُ بِالْبِرِّ وَالزَّكَاةِ فَلَمَّا سَلَّمَ أَبُو مُوسَى أَقْبَلَ عَلَى الْقَوْمِ فَقَالَ أَيُّكُمُ الْقَائِلُ هَذِهِ الْكَلِمَةَ فَأَرَمَّ الْقَوْمُ؟ قَالَ يَا حِطَّانُ لَعَلَّكَ قُلْتَهَا؟ قَالَ لَا وَقَدْ خَشِيتُ أَنْ تَبْكعَنِي بِهَا فَقَالَ إِنَّ رَسُولَ اللهِ ﷺ كَانَ يُعَلِّمُنَا صَلَاتَنَا وَسُنَّتَنَا فَقَالَ إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَالَ {غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلَا الضَّالِّينَ} [الفاتحة 7] فَقُولُوا آمِينَ يُجِبْكُمُ اللهُ وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَقَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا لَكَ الْحَمْدُ يَسْمَعِ اللهُ لَكُمْ فَإِذَا سَجَدَ فَاسْجُدُوا فَإِذَا رَفَعَ فَارْفَعُوا فَإِنَّ الْإِمَامَ يَسْجُدُ قَبْلَكُمْ وَيَرْفَعُ قَبْلَكُمْ قَالَ رَسُولُ اللهِ ﷺ «فَتِلْكَ بِتِلْكَ»  

[Machine] The Messenger of Allah ﷺ said, "Indeed, the imam has been appointed to be followed, so when he says 'Allahu Akbar (Allah is the Greatest),' say 'Allahu Akbar,' and when he bows, bow, and when he raises his head, raise your heads, and when he says 'Sami Allahu liman hamidah (Allah hears whoever praises Him),' say all together 'Allahumma Rabbana lakal hamd (O Allah, our Lord, all praise is for You),' and when he prostrates, prostrate, and do not prostrate before he does, and when he raises his head, raise your heads, and do not raise your heads before he does.  

قَالَ رَسُولُ اللهِ ﷺ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ رَأْسَهُ فَارْفَعُوا رُءُوسَكُمْ وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا جَمِيعًا اللهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَلَا تَسْجُدُوا قَبْلَ أَنْ يَسْجُدَ وَإِذَا رَفَعَ رَأْسَهُ فَارْفَعُوا رُءُوسَكُمْ وَلَا تَرْفَعُوا رُءُوسَكُمْ قَبْلَ أَنْ يَرْفَعَ  

"إِنَّما جعلَ الإِمامُ ليؤتَمَّ به، فإِذا كبَّر فكبِّروا، وإِذا قَرأ فأَنْصِتُوا، وإِذا قال، {غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلَا الضَّالِّينَ}، فقُولوا: آمين، وإذا رَكَعَ فاركعوا، وإذا قال: سمع اللَّه لمن حَمِدَهُ فقولوا: اللَّهُمَّ ربّنا ولك الحمد، وإذا سَجَدَ فاسْجُدُوا. وإِذا صلى جالسًا فصَلُّوا جلوسًا".