Sahih Bukhari
Prophetic Commentary on the Quran (Tafseer of the Prophet (PBUH))
Volume: 006 / Book Number: 060 / Hadith Number: 21
Narrated Ibn 'Umar:
While some people were offering Fajr prayer at Quba mosque, someone came to them and said, "Quranic literature" has been revealed to Allah's Apostle tonight, and he has been ordered to face the Ka'ba (of Mecca) so you too, should turn your faces towards it. Their faces were then towards Sham (Jerusalem), so they turned towards the Qibla (i.e. Ka'ba of Mecca)."