The Book of the Commencement of the Prayer
11/54. Chapter:
Recitation (in prayers) during the day
Sunan an-Nasai
أَخْبَرَنَا مُحَمَّدُ بْنُ قُدَامَةَ، قَالَ حَدَّثَنَا جَرِيرٌ، عَنْ رَقَبَةَ، عَنْ عَطَاءٍ، قَالَ قَالَ أَبُو هُرَيْرَةَ كُلُّ صَلاَةٍ يُقْرَأُ فِيهَا فَمَا أَسْمَعَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم أَسْمَعْنَاكُمْ وَمَا أَخْفَاهَا أَخْفَيْنَا مِنْكُمْ .
It was narrated that 'Ata said: "Abu Hurairah said: "In should be recitation in every prayer. What the Messenger of Allah (ﷺ) made us hear (by reciting out loud) we make you hear, and what he hid from us (by reciting silently) we hide from you.'"
Reference : Sunan an-Nasa'i 969In-book reference : Book 11, Hadith 94English translation : Vol. 2, Book 11, Hadith 970