Herodias was a woman who was first the sister-in-law of Herod the Tetrarch and later became his wife. She was the wife of his brother Philip, but Herod took her as his wife. When John the Baptist rebuked him for this, she sent her daughter to the king's banquet to dance, and through this, she caused John the Baptist to be killed.
Matt 14:3For Herod had seized John and bound him and put him in prison for the sake of Herodias, his brother Philip’s wife,Matt 14:4because John had been saying to Herod, “It is not lawful for you to have her.”Matt 14:5And though Herod wanted to put John to death, he feared the people, because they held him to be a prophet.Matt 14:6But when Herod’s birthday came, the daughter of Herodias danced before them and pleased Herod,
Mark 6:17For Herod himself had sent and seized John and bound him in prison for the sake of Herodias, his brother Philip’s wife, because he had married her.Mark 6:18For John had been saying to Herod, “It is not lawful for you to have your brother’s wife.”Mark 6:19And Herodias had a grudge against John and wanted to put him to death. But she could not,Mark 6:20for Herod feared John, knowing that he was a righteous and holy man, and he protected him. When he heard him, he was greatly perplexed, and yet he heard him gladly.Mark 6:21But a convenient day came, when Herod on his birthday gave a banquet for his nobles and military commanders and the leading men of Galilee.Mark 6:22For when Herodias’s daughter came in and danced, she pleased Herod and his guests. And the king said to the girl, “Ask me for whatever you wish, and I will give it to you.”