Arabic (Original)
حَدَّثَنَا عَفَّانُ حَدَّثَنَا وُهَيْبٌ حَدَّثَنَا مُصْعَبُ بْنُ مُحَمَّدٍ عَنْ أَبِي صَالِحٍ السَّمَّانِ عَنْ أَبِي هُرَيْرَةَ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَلَا تُكَبِّرُوا حَتَّى يُكَبِّرَ وَإِذَا رَكَعَ فَارْكَعُوا وَلَا تَرْكَعُوا حَتَّى يَرْكَعَ وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَلَا تَسْجُدُوا حَتَّى يَسْجُدَ وَإِنْ صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُونَ.
English Translation
The Prophet (peace be upon him) said: "The imam is appointed to be followed. So when he says the takbir, say the takbir, and do not say it until he says it. When he bows, bow, and do not bow until he bows. When he says 'Sami'a Allahu liman hamidah' (Allah hears the one who praises Him), say 'Rabbana wa lakal-hamd' (Our Lord, and to You is the praise). When he prostrates, prostrate, and do not prostrate until he prostrates. And if he prays sitting, then all of you pray sitting."