Judges 11:39-40

New King James Version

³⁹ And it was so at the end of two months that she returned to her father, and he ^(A)carried out his vow with her which he had vowed. She ^[a]knew no man.

And it became a custom in Israel ⁴⁰ that the daughters of Israel went four days each year to ^[b]lament the daughter of Jephthah the Gileadite.