Sahih Muslim , Book 4, Hadith 44 (In-Book) ⓘ

Abu Huraira reported: The Messenger of Allah said: One is not credited with having observed the prayer without the recitation (of al-Fatiha). So said Abu Huraira: (The prayer in which) the Messenger of Allah recited in a loud voice, we also recited that loudly for you (and the prayer in which) he recited inwardly we also recited inwardly for you (to give you a practical example of the prayer of the Holy Prophet).

حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ حَبِيبِ بْنِ الشَّهِيدِ، قَالَ سَمِعْتُ عَطَاءً، يُحَدِّثُ عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ لاَ صَلاَةَ إِلاَّ بِقِرَاءَةٍ ‏" ‏ ‏.‏ قَالَ أَبُو هُرَيْرَةَ فَمَا أَعْلَنَ رَسُولُ اللَّهِ صلى الله عليه وسلم أَعْلَنَّاهُ لَكُمْ وَمَا أَخْفَاهُ أَخْفَيْنَاهُ لَكُمْ ‏.‏