Musannaf Ibn Abi Shayba 3:6140

Waki' narrated to us, he said: 'Umar ibn Shaybah ibn Qāriz narrated to us, from 'Abdullah al-Bahī, the freed slave of the family of al-Zubayr, he said: I accompanied 'Abdullah ibn 'Umar from Makkah to al-Madīnah, and he would pray upon his riding beast facing other than the Qiblah.