Prayer (Kitab Al-Salat)
Dawud :: Book 2 : Hadith 614
Narrated Yazid ibn al-Aswad:
Jabir ibn Yazid ibn al-Aswad reported on the authority of his father: I prayed behind the Apostle of Allah (peace_be_upon_him). When he finished the prayer, he would turn (his face from the direction of the Ka'bah).