When the Imam is reciting, then listen attentively
حَدَّثَنَا جَمِيلُ بْنُ الْحَسَنِ، حَدَّثَنَا عَبْدُ الأَعْلَى، حَدَّثَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنِ ابْنِ أُكَيْمَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ صَلَّى بِنَا رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ فَذَكَرَ نَحْوَهُ وَزَادَ فِيهِ قَالَ فَسَكَتُوا بَعْدُ فِيمَا جَهَرَ فِيهِ الإِمَامُ .
It was narrated that Abu Hurairah said: “The Messenger of Allah (ﷺ) led us in prayer,” and he mentioned a similar report, and added to it, and he said: “And after that they were quiet in the prayers in which the Imam recites aloud.”