Now Herod the tetrarch heard about all that was happening, and he was perplexed, because it was said by some that John had been raised from the dead, by some that Elijah had appeared, and by others that one of the prophets of old had risen. Herod said, “John I beheaded, but who is this about whom I hear such things?” And he sought to see him.

... 

Now it happened that as he was praying alone, the disciples were with him. And he asked them, “Who do the crowds say that I am?” And they answered, “John the Baptist. But others say, Elijah, and others, that one of the prophets of old has risen.” Then he said to them, “But who do you say that I am?” And Peter answered, “The Christ of God.”

(Luke 9.7-9, 18-20)