Narrated Al-Bara:
We prayed along with the Prophet facing Jerusalem for sixteen or seventeen months. Then Allah ordered him to turn his face towards the Qibla (in Mecca):–
“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..” (2.149)
Sahih Bukhari, Volume 6, Book60, Number 19