Mt 21:9-11, Mk 11:7-10, Jn 12:12-16, Lk 19:35-38
In the Old Testament the psalmist said that blessed is he who comes in the name of God and we bless him. (Psalms 118:26)
Psalms 118:26 Blessed be he that cometh in the name of the Lord: we have blessed you out of the house of the Lord.
Jesus is the Christ, the son of David who came in the name of God prophesied in the Old Testament. The Israelites blessed Jesus as the Son of David, who came in the name of God. (Matthew 21:9-11, Mark 11:7-10, John 12:12-16, Luke 19:35-38)
Matthew 21:9And 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. 10 And when he was come into Jerusalem, all the city was moved, saying, Who is this? 11 And the multitude said, This is Jesus the prophet of Nazareth of Galilee.
Mark 11:7 And they brought the colt to Jesus, and cast their garments on him; and he sat upon him. 8 And many spread their garments in the way: and others cut down branches off the trees, and strawed them in the way. 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.
John 12:12 On the next day much people that were come to the feast, when they heard that Jesus was coming to Jerusalem, 13 Took branches of palm trees, and went forth to meet him, and cried, Hosanna: Blessed is the King of Israel that cometh in the name of the Lord. 14 And Jesus, when he had found a young ass, sat thereon; as it is written, 15 Fear not, daughter of Sion: behold, thy King cometh, sitting on an ass's colt. 16 These things understood not his disciples at the first: but when Jesus was glorified, then remembered they that these things were written of him, and that they had done these things unto him.
Luke 19:35 And they brought him to Jesus: and they cast their garments upon the colt, and they set Jesus thereon. 36 And as he went, they spread their clothes in the way. 37 And when he was come nigh, even now at the descent of the mount of Olives, the whole multitude of the disciples began to rejoice and praise God with a loud voice for all the mighty works that they had seen; 38 Saying, Blessed be the King that cometh in the name of the Lord: peace in heaven, and glory in the highest.