Luke 9:18-21

And it came to pass, as he was praying apart, the disciples were with him: and he asked them, saying, Who do the multitudes say that I am? And they answering said, John the Baptist; but others say, Elijah; and others, that one of the old prophets is risen again. And he said unto them, But who say ye that I am? And Peter answering said, The Christ of God. But he charged them, and commanded them to tell this to no man