Sahih Muslim Book: 6, Hadith: 1204

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو الأَحْوَصِ، عَنْ أَبِي إِسْحَاقَ، عَنِ الْبَرَاءِ بْنِ عَازِبٍ، قَالَ صَلَّيْتُ مَعَ النَّبِيِّ صلى الله عليه وسلم إِلَى بَيْتِ الْمَقْدِسِ سِتَّةَ عَشَرَ شَهْرًا حَتَّى نَزَلَتِ الآيَةُ الَّتِي فِي الْبَقَرَةِ ‏{‏ وَحَيْثُمَا كُنْتُمْ فَوَلُّوا وُجُوهَكُمْ شَطْرَهُ‏}‏ فَنَزَلَتْ بَعْدَ مَا صَلَّى النَّبِيُّ صلى الله عليه وسلم فَانْطَلَقَ رَجُلٌ مِنَ الْقَوْمِ فَمَرَّ بِنَاسٍ مِنَ الأَنْصَارِ وَهُمْ يُصَلُّونَ فَحَدَّثَهُمْ فَوَلَّوْا وُجُوهَهُمْ قِبَلَ الْبَيْتِ ‏.‏ Al-Bara’ b. ‘Azib reported:I said prayer with the Apostle (may peace be upon him) turning towards Bait-ul-Maqdis for sixteen months till this verse of Surah Baqara wis revealed:” And wherever you are turn your faces towards it” (ii. 144). This verse was revealed when the Apostle (may peace be upon him) had said prayer. A person amongst his people passed by the people of Ansar as they were engaged in prayer. He narrated to them (this comman...