We find an account of the triumphal entry of Jesus into Jerusalem in all four Gospels: Matthew, Mark, Luke, and John.
In Matthew's Gospel, we see the story in chapter 21. Jesus enters Jerusalem riding on a donkey, and the crowds spread their cloaks and palm branches on the road, shouting, "Hosanna to the Son of David!"
In Mark's Gospel, the triumphal entry is described in chapter 11. Similar to Matthew, Jesus rides into Jerusalem on a donkey, and the people lay their cloaks and palm branches on the path, exclaiming, "Hosanna! Blessed is he who comes in the name of the Lord!"
Luke's Gospel, chapter 19, also recounts the triumphal entry. Here, Jesus rides on a colt, and the crowd rejoices, praising God and saying, "Blessed is the king who comes in the name of the Lord! Peace in heaven and glory in the highest!"
Lastly, in John's Gospel, chapter 12, we again witness the triumphal entry of Jesus. The people welcome Jesus by waving palm branches and shouting, "Hosanna! Blessed is he who comes in the name of the Lord, even the King of Israel!"
In summary, all four Gospels provide accounts of Jesus' triumphal entry into Jerusalem, each with slightly different details, but all highlighting the enthusiasm and praise of the crowd as they recognized Jesus' significance and welcomed him as the Messiah.