Matthew 16:17-18

16:17 And Jesus answered him, “You are blessed, Simon son of Jonah, because flesh and blood did not reveal this to you, but my Father in heaven! 16:18 And I tell you that you are Peter, and on this rock I will build my church, and the gates of Hades will not overpower it.

Matthew 16:23

16:23 But he turned and said to Peter, “Get behind me, Satan! You are a stumbling block to me, because you are not setting your mind on God’s interests, but on man’s.”