And those who went in front of him, and those who followed after, were crying out, “Hosanna!a Blessed is he who comes in the name of the Lord!b Bible see other translations
“Hosanna” is an Aramaic word originally meaning “Help, I pray” or “Save now.” But by NT times, it came to be used as an expression of praise.
From Ps. 118:25-26

“Hosanna.” The people who were shouting praises to Jesus as he entered Jerusalem were for the most part not the same group as the group that shouted, “Crucify him” only a few days later. See commentary on Luke 23:21 and commentary on Luke 23:27.

Commentary for: Mark 11:9