Mark 6:18
For John had said to Herod, "It is not lawful for you to have your brother's wife."
Luke 3:19-20
But Herod the tetrarch, being rebuked by him concerning Herodias, his brother's wife, and for all the other evil things Herod had done,
Treasury of Scripture Knowledge
Summary
Thus saith the LORD; Go down to the house of the king of Judah, and speak there this word,