Musnad Ahmad 1291:1

Muhammad ibn Bakr narrated to us, Ibn Jurayj informed us, Ubayd Allah ibn Abi Yazid informed me, that Abd al-Rahman ibn Tariq ibn Alqama informed him, from his mother: "That the Prophet, peace and blessings of Allah be upon him, whenever he entered a place in the house of Ya'la — Ubayd Allah attributed it — he would face the House (the Ka'bah) and supplicate."