Sahih Muslim, Book 001, Number 0309:
It is narrated on the authority of Anas b. Malik that the Messenger of Allah (may peace be upon him) said: I was brought((((((( al-Buraq Who is an animal white and long, larger than a donkey but smaller than a mule,))))))) who would place his hoof a distance equal to the range of vision. I mounted it and came to the Temple (Bait Maqdis in Jerusalem), then tethered it to the ring used by the prophets. I entered the mosque and prayed two rak'ahs in it, and then came out and Gabriel brought me a vessel of wine and a vessel of milk.