From a friend:
“If you deliver the Ammonites into my power,” he said, “whoever comes out of the doors of my house to meet me when I return in triumph from the Ammonites shall belong to the LORD. I shall offer him up as a burnt offering.” … When Jephthah returned to his house in Mizpah, it was his daughter who came forth, playing the tambourines and dancing…. At the end of the two months she returned to her father, who did to her as he had vowed.– Judges 11
Thus endeth the lesson.