حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ قَالَ أَخْبَرَنَا مَالِکٌ عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ أَبِيهِ عَنْ عَائِشَةَ أُمِّ الْمُؤْمِنِينَ أَنَّهَا قَالَتْ صَلَّی رَسُولُ اللَّهِ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ فِي بَيْتِهِ وَهُوَ شَاکٍ فَصَلَّی جَالِسًا وَصَلَّی وَرَائَهُ قَوْمٌ قِيَامًا فَأَشَارَ إِلَيْهِمْ أَنْ اجْلِسُوا فَلَمَّا انْصَرَفَ قَالَ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا رَکَعَ فَارْکَعُوا وَإِذَا رَفَعَ فَارْفَعُوا فَارْفَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَکَ الْحَمْدُ وَإِذَا صَلَّی جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُوْنَ
صحیح بخاری · Hadith 688
Narrated Aisha: the mother of the believers: Allah's Apostle during his illness prayed at his house while sitting whereas some people prayed behind him standing. The Prophet beckoned them to sit down. On completion of the prayer, he said, 'The Imam is to be followed: bow when he bows, raise up your heads (stand erect) when he raises his head and when he says, 'Sami`a l-lahu liman hamidah' (Allah heard those who sent praises to Him) say then 'Rabbana wa laka l-hamd' (O our Lord! All the praises are for You), and if he prays sitting then pray sitting."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020