it is Peter's confession where he admits that Jesus is the Christ and Jesus' revelation that the messiah must die.
In Christianity, the Confession of Peter alludes to a scene in the New Testament in which the Apostle Peter declares Jesus to be the Christ (Jewish Messiah). This is depicted in the three Synoptic Gospels: Matthew 16:13-20, Mark 8:27– 30 and Luke 9:18– 20. The Marks's verses are as below:
"Jesus went out, along with His disciples, to the villages of Caesarea Philippi; and on the way He questioned His disciples, saying to them, “Who do people say that I am?” They told Him, saying, “John the Baptist; and others say Elijah; but others, one of the prophets.” And He continued by questioning them, “But who do you say that I am?” Peter *answered and *said to Him, “You are the Christ.” And He [b]warned them to tell no one about Him."