In Abrahamic religions, Haizum is the favorite horse of the archangel Gabriel.
It is a white, flaming, spiritual horse which has a pair of wings like that of a pegasus and can fly swiftly from one cosmic plane to another in a second. Haizum was God's gift to Gabriel for pleasing Him and Gabriel is Haizum's sole master.
In Islam, where Gabriel is known as Jibreel, a legend based on sura 20:88 relates that when the dust from the hoofprints of Haizum was thrown into the mouth of the Golden Calf, the Calf at once became animated.