The Apostle of Allah ﷺ fell down from a horse and his right side was grazed. We went to him to inquire after his health when the time of prayer came. He led us in prayer in a sitting posture and we said prayer behind him sitting, and when he finished the prayer hesaid: The Imam is appointed only to be followed; so when he recites takbir, you should also recite that; when he prostrates, you should also prostrate; when he rises up, you should also rise up, and when he said" God listens to him who praises Him," you should say:" Our Lord, to Thee be the praise," and when he prays sitting, all of you should pray sitting.  

سَمِعْتُ أَنَسَ بْنَ مَالِكٍ يَقُولُ سَقَطَ النَّبِيُّ ﷺ عَنْ فَرَسٍ فَجُحِشَ شِقُّهُ الأَيْمَنُ فَدَخَلْنَا عَلَيْهِ نَعُودُهُ فَحَضَرَتِ الصَّلاَةُ فَصَلَّى بِنَا قَاعِدًا فَصَلَّيْنَا وَرَاءَهُ قُعُودًا فَلَمَّا قَضَى الصَّلاَةَ قَالَ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا رَفَعَ فَارْفَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ وَإِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا 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.  

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 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.”  

أَنَّ النَّبِيَّ ﷺ صُرِعَ عَنْ فَرَسٍ فَجُحِشَ شِقُّهُ الأَيْمَنُ فَدَخَلْنَا نَعُودُهُ وَحَضَرَتِ الصَّلاَةُ فَصَلَّى بِنَا قَاعِدًا وَصَلَّيْنَا وَرَاءَهُ قُعُودًا فَلَمَّا قَضَى الصَّلاَةَ قَالَ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا أَجْمَعِينَ  

“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 فَدَخَلْنَا عَلَيْهِ نَعُودُهُ فَحَضَرَتِ الصَّلَاةُ فَصَلَّى قَاعِدًا وَصَلَّيْنَا قُعُودًا فَلَمَّا قَضَى الصَّلَاةَ قَالَ إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَقَالَ سُفْيَانُ مَرَّةً فَإِذَاسَجَدَ فَاسْجُدُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ وَإِنْ صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا أَجْمَعُونَ  

[Machine] When the Prophet ﷺ fell ill, his companions entered to visit him. They were trying to heal him, so he signaled to them to sit down. When he finished his prayer, the imam instructed them to follow his actions. When he said the takbir, they should say it as well. When he performed the ruku', they should also bow down. When he prayed while sitting, they should pray while sitting. And when he prayed while standing, they should pray while standing.  

لَمَّا مَرِضَ النَّبِيُّ ﷺ دَخَلَ عَلَيْهِ أَصْحَابُهُ يَعُودُونَهُ فَقَامُوا فَأَوْمَأَ إِلَيْهِمْ أَنِ اقْعُدُوا فَلَمَّا قَضَى صَلَاتَهُ قَالَ الْإِمَامُ يُؤْتَمُّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا وَإِذَا صَلَّى قَائِمًا فَصَلُّوا قِيَامًا  

"سَقَطَ النبِيّ ﷺ عَنْ فَرَس مجحش (*) شِقُّهُ الأيْمَنُ فَدَخَلنَا عَلَيْهِ نَعودُهُ فَحَضرَت الصَّلاَة فَصَلَّى بِنَا قَاعِدَا وَصَلَّيْنَا خَلَفْهُ قِيَامًا فَأشَارَ أنْ اقْعُدُوا، فَلَمَّا قَضَى الصَّلاَةَ قَالَ: إِنَّمَا جُعِلَ الإمَامُ لِيُؤتَمَّ بِهِ، فَإِذَا كبَّر فَكَبِّرُوا، وَإِذَا رَكَعَ فَارْكَعُوا، وَإِذَا سَجَدَ فَاسْجُدُوا، وَإذَا رَفَعَ فَارْفَعُوا، وَإِذَا قَالَ: سَمِعَ الله لِمَنْ حَمِدَهُ فَقُوُلوا: اللَّهمَ رَبّنَا وَلَكَ الحَمْد، وَإنْ صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا أجْمَعُونَ ".