Sahih al-Bukhari 4493
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"And from wheresoever you start forth (for prayers) turn your face in the direction of AI-Masjid-al-Haram (at Makkah)..." (V.2:149)
Narrated Ibn `Umar: While some people were at Quba (offering) morning prayer, a man came to them and said, "Last night Qur'anic Verses have been revealed whereby the Prophet (ﷺ) has been ordered to face the Ka`ba (at Mecca), so you too should face it." So they, keeping their postures, turned towards the Ka`ba. Formerly the people were facing Sham (Jerusalem) (Allah said):-- "And from whence-so-ever you start forth (for prayers), turn your face in the direction of the Sacred Mosque of Mecca (Al-Masjid-ul-Haram), and whence-so-ever you are, turn your face towards it (when you pray)" (2:150)