Mark 6:18-20

6:18 For John had repeatedly told Herod, “It is not lawful for you to have your brother’s wife.” 6:19 So Herodias nursed a grudge against him and wanted to kill him. But she could not 6:20 because Herod stood in awe of John and protected him, since he knew that John was a righteous and holy man. When Herod heard him, he was thoroughly baffled, and yet he liked to listen to John.