A quick re-write of Judges 11.34-39;
"And Jephthah came to Mizpeh unto his house, and, behold his daughter came out to meet him with timbrels and with dances: and she was his only child; beside her he had neither son nor daughter.
And it came to pass, when he saw her, that he rent his clothes and proclaimed Alas, my daughter, I promised got that I would burn whatever I saw first on my return as a sacrifice.
And she said to him, WTF are you out of your mind? Get away from me you sick deluded pervert! and ran for the hills.
Jephthah sent out search parties and, after two months of combing the surrounding area, she was brought before her father who proceeded to slaughter and burn his virgin daughter.
This was deemed worthy of remembrance for some reason, and the women of Israel would morn her passing yearly, four days in a year."