The Synoptic writers gave more detail about Jesus securing the young donkey. John simply reported that He entered Jerusalem riding on it and thereby fulfilled Zechariah"s prophecy about how Messiah would present Himself to the nation ( Zechariah 9:9). "Fear not" comes from Isaiah 40:9, which addresses those to whom good news about Zion comes. "Daughter of Zion" is a common Old Testament description of the people of Jerusalem as the oppressed people of God (cf. Isaiah 1:8; Jeremiah 4:31; Lamentations 2:4; Micah 4:8; Zephaniah 3:14; Zechariah 2:10; et al.). The context of Zechariah 9:9 is worthy of examination since it describes more about Messiah"s reign. Even though Messiah had appeared, His reign would not begin then. He would not "give salvation now" because of Israel"s rejection of her King. [source][source][source]