حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّهُ قَالَ بَيْنَمَا النَّاسُ بِقُبَاءٍ فِي صَلاَةِ الصُّبْحِ إِذْ جَاءَهُمْ آتٍ فَقَالَ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَدْ أُنْزِلَ عَلَيْهِ اللَّيْلَةَ قُرْآنٌ وَقَدْ أُمِرَ أَنْ يَسْتَقْبِلَ الْكَعْبَةَ فَاسْتَقْبِلُوهَا وَكَانَتْ وُجُوهُهُمْ إِلَى الشَّامِ فَاسْتَدَارُوا إِلَى الْكَعْبَةِ ‏.‏

Yahya related to me from Malik from Abdullah ibn Dinar thatAbdullah ibn Umar said, "On one occasion when the people were prayingsubhat Quba a man came to them and said, 'A piece of Qur'an was sentdown to the Messenger of Allah, may Allah bless him and grant himpeace, last night, and he was ordered to face the Kaba, so face it.'They had been facing ash-Sham, so they turned round and faced theKaba.'' Translation Not Available

Book Ref: Muwatta Imam Malik Book 14 Hadith 463
Web Ref:  Muwatta Imam Malik Book 14 Hadith 6