'Foal' in the Bible

“He ties his foal to the vine,And his donkey’s colt to the choice vine;He washes his garments in wine,And his robes in the blood of grapes.

“An idiot will become intelligentWhen the foal of a wild donkey is born a man.

Rejoice greatly, O daughter of Zion!Shout in triumph, O daughter of Jerusalem!Behold, your king is coming to you;He is just and endowed with salvation,Humble, and mounted on a donkey,Even on a colt, the foal of a donkey.