Mark 6:17-20

For Herod himself had sent forth and laid hold upon John, and bound him in prison for the sake of Herodias, his brother Philip’s wife; for he had married her. For John said unto Herod, It is not lawful for thee to have thy brother’s wife. And Herodias set herself against him, and desired to kill him; and she could not; for Herod feared John, knowing that he was a righteous and holy man, and kept him safe. And when he heard him, he was much perplexed; and he heard him gladly.