14 Jesus found a young donkey and sat on it; as it is written: 15 "Do not be afraid, daughter of Zion. Look, your king is coming, sitting on a donkey's colt!" 16 His disciples did not understand these things at first; but when Jesus was glorified, then they remembered that these things had been written of him and had been done to him.
Matthew Henry's Commentary on John 12:14-16
Commentary on John 12:12-19
(Read John 12:12-19)
Christ's riding in triumph to Jerusalem is recorded by all the evangelists. Many excellent things, both in the word and providence of God, disciples do not understand at their first acquaintance with the things of God. The right understanding of spiritual nature of Christ's kingdom, prevents our misapplying the Scriptures which speak of it.