حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنِ الزُّهْرِيِّ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ 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 " .
It wasnarrated from Anas bin Malik that the Prophet (PBUH) fell fromhishorse and he suffered some lacerations on his right side. We wenttovisit him and the time for prayer came. He led us in prayer sittingdown, and we prayed behind him sitting down. When he finished theprayer he said: “The Imam is appointed to be followed. When he saysAllahu Akbar, then say Allahu Akbar; when he bows, then bow; when hesays Sami’ Allahu liman hamidah, then say Rabbana wa lakal-hamd;whenhe prostrates then prostrate; and if he prays sitting down thenpraysitting down.” Translation Not Available
Book Ref: Sunan Ibn Majah Book 5 Hadith 1238
Web Ref: Sunan Ibn Majah Vol 1 Book 5 Hadith 1238