Judges 11:39-40

Revised Standard Version

³⁹ And at the end of two months, she returned to her father, who did with her according to his vow which he had made. She had never known a man. And it became a custom in Israel ⁴⁰ that the daughters of Israel went year by year to lament the daughter of Jephthah the Gileadite four days in the year.