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 ‏.‏

Abu Huraira reported: The Messenger of Allah (PBUH) 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 (PBUH) 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). Translation Not Available

Book Ref: Sahih Muslim Book 4 Hadith 778
Web Ref:  Sahih Muslim Book 4 Hadith 396 a