Mark 6:22-25

22and when the daughter of Herodias herself came in and danced, she pleased Herod and them that sat at meat with him; and the king said unto the damsel, Ask of me whatsoever thou wilt, and I will give it thee. 23And he sware unto her, Whatsoever thou shalt ask of me, I will give it thee, unto the half of my kingdom. 24And she went out, and said unto her mother, What shall I ask? And she said, The head of John the Baptizer. 25And she came in straightway with haste unto the king, and asked, saying, I will that thou forthwith give me on a platter the head of John the Baptist.