Sunan Ibn Majah 1238
It was
narrated from Anas bin Malik that the Prophet (ﷺ) fell from
his
horse and he suffered some lacerations on his right side. We went
to
visit him and the time for prayer came. He led us in prayer sitting
down, and we prayed behind him sitting down. When he finished the
prayer he said:
“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.”
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 ‏"‏ ‏.‏