Mark 6:22-26

and when the daughter of Herodias herself came in and danced, she pleased Herod and his dinner guests; and the king said to the girl, “Ask me for whatever you want, and I will give it to you.”

And he swore to her, “Whatever you ask of me, I will give it to you, up to half of my kingdom.”

And she went out and said to her mother, “What shall I ask for?” And she said, “The head of John the Baptist.”

Immediately she came in a hurry to the king and asked, saying, “I want you to give me at once the head of John the Baptist on a platter.”

And although the king was very sorry, because of his oaths and his dinner guests, he was unwilling to refuse her.