The daughters mourn

36And she said to him, “My father, you have opened your mouth to Yahweh; do to me according to what has gone out from your mouth, since Yahweh has taken vengeance for you on your enemies, on the sons of Ammon.”

37And she said to her father, “Let this thing be done for me: leave me alone for two months, that I may go and wander on the mountains and weep over my virginity, I and my companions.”

38And he said, “Go.” So he sent her away for two months, and she went, she and her companions, and wept over her virginity on the mountains.

39And at the end of two months she returned to her father, and he did to her according to his vow that he had vowed. Now she had not known a man. And it became a statute in Israel:

40From year to year the daughters of Israel would go to commemorate the daughter of Jephthah the Gileadite four days in the year.