Mt 21:9, Mk 11:9-10, Lk 19:38, Jn 12:3, Ps 8:2, Rev 19:16
In the Old Testament, it was foretold that God, the King of glory, would enter. (Psalms 24:7-10)
Psalms 24:7 Lift up your heads, O ye gates; and be ye lift up, ye everlasting doors; and the King of glory shall come in. 8 Who is this King of glory? The Lord strong and mighty, the Lord mighty in battle. 9 Lift up your heads, O ye gates; even lift them up, ye everlasting doors; and the King of glory shall come in. 10 Who is this King of glory? The Lord of hosts, he is the King of glory. Selah.
When Jesus entered Jerusalem, the Israelites welcomed Jesus as the Christ who came in the name of God. (Matthew 21:9, Mark 11:9-10, Luke 19:38)
Matthew 21:9 And the multitudes that went before, and that followed, cried, saying, Hosanna to the son of David: Blessed is he that cometh in the name of the Lord; Hosanna in the highest.
Mark 11:9 And they that went before, and they that followed, cried, saying, Hosanna; Blessed is he that cometh in the name of the Lord: 10 Blessed be the kingdom of our father David, that cometh in the name of the Lord: Hosanna in the highest.
Luke 19:38 Saying, Blessed be the King that cometh in the name of the Lord: peace in heaven, and glory in the highest.