Musannaf Ibn Abi Shayba 3:5063

Mu'alla ibn Mansur narrated to us, he said: 'Abd al-A'la ibn Ja'far narrated to us, from 'Uthman ibn Muhammad al-Akhnasi, from al-Maqburi, from Abu Hurayrah, from the Prophet, peace and blessings of Allah be upon him, who said: "Whatever is between the East and the West is a Qiblah."