Mark 6:21-24

And when a convenient day was come, that Herod on his birthday made a supper to his lords, and the high captains, and the chief men of Galilee; and 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. And he sware unto her, Whatsoever thou shalt ask of me, I will give it thee, unto the half of my kingdom. And she went out, and said unto her mother, What shall I ask? And she said, The head of John the Baptizer.