Judges 11:39-40

Wycliffe Bible

³⁹ And when two months were fulfilled, she turned again to her father, and he did to her as he (had) avowed; and she knew no man fleshly, (that is, she died a virgin). From that time a custom came in Israel, and that custom is kept (to this day),

⁴⁰ that after the end of the year the daughters of Israel come together, and bewail the daughter of Jephthah of Gilead (for) four days.