Matthew 21:2-5 NIV

2 saying to them, "Go to the village ahead of you, and at once you will find a donkey tied there, with her colt by her. Untie them and bring them to me.
3 If anyone says anything to you, tell him that the Lord needs them, and he will send them right away."
4 This took place to fulfill1 what was spoken through the prophet:

References for Matthew 21:4

5 "Say to the Daughter of Zion, 'See, your king comes to you, gentle and riding on a donkey, on a colt, the foal of a donkey.' "a2

References for Matthew 21:5