Judges 11:28-40
11:28 But the king of the children of Ammon would not listen to the words of Jephthah, which he sent him.
11:29 And the Spirit of Jehovah came upon Jephthah. And he passed through Gilead and through Manasseh; and he passed on to Mizpeh of Gilead, and from Mizpeh of Gilead he passed on to the children of Ammon.
11:30 And Jephthah made a vow to Jehovah, and he said, If You will really deliver the children of Ammon into my hand,
11:31 Whoever comes out through the doors of my house to meet me when I return in peace from the children of Ammon will be Jehovah’s, and I will offer him up as a burnt offering.
11:32 And Jephthah passed on to the children of Ammon to fight against them, and Jehovah delivered them into his hand.
11:33 And he struck them from Aroer until you come to Minnith, twenty cities, and to Abel-keramim, with a very great stroke. So the children of Ammon were subdued before the children of Israel.
11:34 Then Jephthah came to his house at Mizpah, and there came his daughter out to meet him, with timbrels and with dances. Now she was an only child; he had no son or daughter besides her.
11:35 And when he saw her, he tore his clothes and said, Ah, my daughter! You have brought me very low, and you are among those who trouble me. For I have opened my mouth to Jehovah, and I cannot retract it.
11:36 And she said to him, My father, you have opened your mouth to Jehovah; do with me according to what has gone forth from your mouth, seeing that Jehovah has executed vengeance for you on your enemies, on the children of Ammon.
11:37 And she said to her father, Let this thing be done for me: Let me be alone for two months that I may depart and descend upon the mountains, and bewail my virginity, I and my companions.
11:38 And he said, Go; and he sent her away for two months. And she departed, she and her companions, and bewailed her virginity upon the mountains.
11:39 And at the end of two months she returned to her father, and he did with her according to the vow that he had vowed; and she had never known a man. And it became a custom in Israel
11:40 That each year the daughters of Israel would go to lament the daughter of Jephthah the Gileadite, four days in the year.