"The Messenger of Allah ﷺ said: 'The Imam is appointed to be followed, so when he says the takbir, say the takbir, and when he recites, be silent, and when he says: "Sami' Allahu liman hamidah (Allah hears those who praise Him)," say: "Allahumma rabbana lakal-hamd (Our Lord, to You be praise)." (Using translation from Nasāʾī 921)  

قَالَ رَسُولُ اللهِ ﷺ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَرَأَ فَأَنْصِتُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا اللهُمَّ رَبَّنَا لَكَ الْحَمْدُ  

[Machine] The Messenger of Allah ﷺ said, "The imam is to be followed, so when he says 'Allahu Akbar', you should say 'Allahu Akbar' and when he recites the Quran, you should remain silent." Abu Abdur Rahman said to us, "We do not know of anyone who followed Ibn Ajlan in his saying 'and when he recites the Quran, you should remain silent'."  

قَالَ رَسُولُ اللهِ ﷺ «إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَرَأَ فَأَنْصِتُوا» قَالَ لَنَا أَبُو عَبْدِ الرَّحْمَنِ لَا نَعْلَمُ أَنَّ أَحَدًا تَابَعَ ابْنَ عَجْلَانَ عَلَى قَوْلِهِ وَإِذَا قَرَأَ فَأَنْصِتُوا