Musannaf Ibn Abi Shayba 27:60

Affan narrated to us, he said: Hammad bin Salamah narrated to us, from Asim, from Zirr, from Hudhayfah, that the Messenger of Allah (may Allah bless him and grant him peace) was brought the Buraq. It is a white, long beast that places its hoof at the furthest point of its sight. He said: Its back did not depart from him and Jibril until they reached Bayt al-Maqdis.