Judges 11:38-40

New Century Version

³⁸ Jephthah said, “Go.” So he sent her away for two months. She and her friends stayed in the mountains and cried for her because she would never marry. ³⁹ After two months she returned to her father, and Jephthah did to her what he had promised. Jephthah’s daughter never had a husband.

From this came a custom in Israel that ⁴⁰ every year the young women of Israel would go out for four days to remember the daughter of Jephthah from Gilead.