Most of the crowd spread their coats on the road [as before a king], while others were cutting branches from the trees and spreading them on the road.
2 Kings 9:13
Then they hurried and each man took his garment and placed it [as a cushion] under Jehu on the top of the [outside] stairs, and blew the trumpet, saying, “Jehu is king!”
Now on the first day you shall take for yourselves the foliage of beautiful trees, branches of palm trees, and boughs of thick (leafy) trees, and willows of the brook [and make booths of them]; and you shall rejoice before the Lord your God for seven days.
they took branches of palm trees [in homage to Him as King] and went out to meet Him, and they began shouting and kept shouting “Hosanna! Blessed (celebrated, praised) is He who comes in the name of the Lord, even the King of Israel!”