عَنْ عَمْرِو بْنِ دِينَارٍ أَنَّ أَبَا مَعْبَدٍ مَوْلَى ابْنِ عَبَّاسٍ أَخْبَرَهُ أَنَّ ابْنَ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُ أَخْبَرَهُ أَنَّ رَفْعَ الصَّوْتِ بِالذِّكْرِ حِينَ يَنْصَرِفُ النَّاسُ مِنَ الْمَكْتُوبَةِ كَانَ عَلَى عَهْدِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ وَأَنَّهُ قَالَ: قَالَ ابْنُ عَبَّاسٍ: كُنْتُ أَعْلَمُ إِذَا انْصَرَفُوا بِذَلِكَ إِذَا سَمِعْتُهُ
Sayyiduna Abdullah bin Abbas (may Allah be pleased with him) informed his servant Abu Ma’bad that during the Prophetic era, when people finished the obligatory prayer, they would raise their voices with dhikr. Furthermore, he said: In fact, when I used to hear this (dhikr’s) sound, I would recognize that the people had finished the prayer.