Judges 11:38-40

Amplified Bible

³⁸ And he said, “Go.” So he sent her away for two months; and she left with her companions, and wept over her virginity on the mountains. ³⁹ At the end of two months she returned to her father, who did to her as he had vowed; and she had no relations with a man. It became a custom in Israel, ⁴⁰ that the daughters of Israel went yearly to tell the story of the daughter of Jephthah the Gileadite four days in the year.