Messenger of Allah ﷺ fell down from a horse and his right side was either injured or scratched, so we went to inquire about his health. The time for the prayer became due and he offered the prayer while sitting and we prayed while standing. He said, "The Imam is to be followed; so if he says Takbir, you should also say Takbir, and if he bows you should also bow; and when he lifts his head you should also do the same and if he says: Samiʿa l-lahu liman hamidah (Allah hears whoever sends his praises to Him) you should say: Rabbana walakal-Hamd (O our Lord! All the praises are for You.") (See Hadith No. 656 Vol. 1).  

سَقَطَ رَسُولُ اللَّهِ ﷺ مِنْ فَرَسٍ فَخُدِشَ أَوْ فَجُحِشَ شِقُّهُ الأَيْمَنُ فَدَخَلْنَا عَلَيْهِ نَعُودُهُ فَحَضَرَتِ الصَّلاَةُ فَصَلَّى قَاعِدًا فَصَلَّيْنَا قُعُودًا وَقَالَ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَارْفَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ  

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. 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  

“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 فَحَضَرَتْ صَلَاةٌ فَصَلَّى بِنَا قَاعِدًا فَلَمَّا قَضَى صَلَاتَهُ قَالَ «إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَارْفَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ 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 رَسُولُ اللهِ ﷺ مِنْ فَرَسٍ فَجُحِشَ شِقُّهُ الْأَيْمَنُ فَدَخَلْنَا عَلَيْهِ نَعُودُهُ فَصَلَّى قَاعِدًا فَصَلَّيْنَا قُعُودًا فَلَمَّا قَضَى الصَّلَاةَ قَالَ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ 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)   

رَسُولُ اللهِ ﷺ مِنْ فَرَسٍ فَجُحِشَ شِقُّهُ الْأَيْمَنُ فَدَخَلْنَا عَلَيْهِ نَعُودُهُ فَحَضَرَتِ الصَّلَاةُ فَصَلَّى قَاعِدًا فَصَلَّيْنَا قُعُودًا فَلَمَّا قَضَى الصَّلَاةَ قَالَ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَارْفَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا أَجْمَعِينَ  

"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 ".