Messenger of Allah ﷺ rode a horse and fell down and the right side of his body was injured. On that day he prayed one of the prayers sitting and we also prayed behind him sitting. When the Prophet ﷺ finished the prayer with Taslim, he said, "The Imam is to be followed and if he prays standing then pray standing, and bow when he bows, and raise your heads when he raises his head; prostrate when he prostrates; and if he says "Samiʿa l-lahu liman hamidah", you should say, "Rabbana wa laka l-hamd.:  

أَنَّ رَسُولَ اللَّهِ ﷺ رَكِبَ فَرَسًا فَجُحِشَ شِقُّهُ الأَيْمَنُ قَالَ أَنَسٌ ؓ فَصَلَّى لَنَا يَوْمَئِذٍ صَلاَةً مِنَ الصَّلَوَاتِ وَهْوَ قَاعِدٌ فَصَلَّيْنَا وَرَاءَهُ قُعُودًا ثُمَّ قَالَ لَمَّا سَلَّمَ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا صَلَّى قَائِمًا فَصَلُّوا قِيَامًا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَارْفَعُوا وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ  

The Imam is appointed to be followed. So recite takbir when he recites it, and bow down when he bows down and when he utters:" Allah listens to him who praises Him," say" O Allah, our Lord, for Thee be the praise." And when he prays, standing, you should pray standing. And when he prays sitting, all of you should pray sitting.  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ قَالَ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا صَلَّى قَائِمًا فَصَلُّوا قِيَامًا وَإِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا أَجْمَعُونَ  

The Prophet ﷺ said: The imam is appointed only to be followed; when he says "Allah is most great," say "Allah is most great" and do not say "Allah is most great" until he says "Allah is most great." When he bows; bow; and do not bow until he bows. And when he says "Allah listens to him who praise Him," say "O Allah, our Lord, to Thee be the praise." The version recorded by Muslim goes: "And to Thee be the praise: And when he prostrate; and do not prostrate until he prostrates. When he prays standing, pray standing, and when he prays sitting, all of you pray sitting.  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَلاَ تُكَبِّرُوا حَتَّى يُكَبِّرَ وَإِذَا رَكَعَ فَارْكَعُوا وَلاَ تَرْكَعُوا حَتَّى يَرْكَعَ وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ قَالَ مُسْلِمٌ وَلَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَلاَ تَسْجُدُوا حَتَّى يَسْجُدَ وَإِذَا صَلَّى قَائِمًا فَصَلُّوا قِيَامًا وَإِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا أَجْمَعُونَ  

“The Imam is appointed to be followed. When he says Allahu Akbar, then say Allahu Akbar; when he bows, then bow; when he says Sami’ Allahu liman hamidah, then say Rabbana wa lakal-hamd; when he prostrates then prostrate; and if he prays sitting down then pray sitting down.” (Using translation from Ibn Mājah 1238)   

سَقَطَ النَّبِيُّ ﷺ مِنْ فَرَسٍ فَجُحِشَ شِقُّهُ الْأَيْمَنُ فَدَخَلُوا عَلَيْهِ فَصَلَّى بِهِمْ قَاعِدًا وَأَشَارَ إِلَيْهِمْ أَنْ اقْعُدُوا فَلَمَّا سَلَّمَ قَالَ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى جَالِسًا فَصَلُّواجُلُوسًا أَجْمَعُونَ  

[Machine] On the authority of the Prophet ﷺ , he said: "Verily, the Imam is only to be followed. So when he says 'Allahu Akbar' (Allah is the greatest), say 'Allahu Akbar' and do not say it until he says it. And when he bows, bow with him and do not bow until he bows. And when he says 'Sami Allahu liman hamidah' (Allah hears those who praise Him), say 'Rabbana wa lakal hamd' (Our Lord, praise is for You) and do not say it until he says it. And when he prostrates, prostrate with him and do not prostrate until he prostrates. And if he prays sitting, then pray all sitting."  

عَنِ النَّبِيِّ ﷺ قَالَ إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَلَا تُكَبِّرُوا حَتَّى يُكَبِّرَ وَإِذَا رَكَعَ فَارْكَعُوا وَلَا تَرْكَعُوا حَتَّى يَرْكَعَ وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَلَا تَسْجُدُوا حَتَّى يَسْجُدَ وَإِنْ صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُونَ  

The Prophet ﷺ said, "The Imam is to be followed. Say the Takbir when he says it; bow if he bows; if he says 'Samiʿa l-lahu liman hamidah', say, ' Rabbana wa laka l-hamd', prostrate if he prostrates and pray sitting altogether if he prays sitting." (Using translation from Bukhārī 734)  

وَقَالَ رَسُولُ اللهِ ﷺ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِفَلَا تَخْتَلِفُوا عَلَيْهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا اللهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُونَ  

The Prophet ﷺ said, "The Imam is to be followed. Say the Takbir when he says it; bow if he bows; if he says 'Samiʿa l-lahu liman hamidah', say, ' Rabbana wa laka l-hamd', prostrate if he prostrates and pray sitting altogether if he prays sitting." (Using translation from Bukhārī 734)  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا صَلَّى قَائِمًا فَصَلُّوا قِيَامًا وَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُونَ  

The Imam is appointed to be followed. So recite takbir when he recites it, and bow down when he bows down and when he utters:" Allah listens to him who praises Him," say" O Allah, our Lord, for Thee be the praise." And when he prays, standing, you should pray standing. And when he prays sitting, all of you should pray sitting. (Using translation from Muslim 417)  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَارْفَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا صَلَّى قَائِمًا فَصَلُّوا قِيَامًا وَإِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا أَجْمَعُونَ»  

The Messenger of Allah ﷺ said: The Imam is appointed, so that he should be followed, so don't be at variance with him. Recite takbir when he recites it; bow down when he bows down and when he says:" Allah listens to him who praises Him," say:" O Allah, our Lord, to Thee be the Praise." And when he (the Imam) prostrates, you should also prostrate, and when he says prayer sitting, you should all observe prayer sitting. (Using translation from Muslim 414a)   

قَالَ رَسُولُ اللهِ ﷺ إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَلَا تَخْتَلِفُوا عَلَيْهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا اللهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُونَ  

"إِنَّما جُعِلَ الإِمامُ ليُؤتَمَ به، فإِذا كَبَّرَ فكبرُوا، وَلَا تُكبِّرُوا حتى يُكبِّر فإِذا رَكعَ فارْكعُوا، وَلَا ترْكَعُوا حتَّى يَرْكعَ، فإِذا قال: سَمِعَ اللَّه لِمَنْ حَمِدَه فقولوا: اللَّهُمَّ رَبنا لك الحَمْدُ، وإِذا سَجَدَ فاسْجُدُوا ولا تَسْجُدُوا حتى يْسجُدَ، وإِذا صَلَّى قَائِمًا فَصَلُّوا قِيامًا، وإِذا صلَّى قاعِدًا فصَلُّوا قُعُودًا أجْمَعِين".