Judges 11:34

31 then it shall be, that whatever comes forth from the doors of my house to meet me, when I return in peace from the children of Ammon, it shall be Yahweh`s, and I will offer it up for a burnt offering.

32 So Jephthah passed over to the children of Ammon to fight against them; and Yahweh delivered them into his hand.

33 He struck them from Aroer until you come to Minnith, even twenty cities, and to Abelcheramim, with a very great slaughter. So the children of Ammon were subdued before the children of Israel.

34 Jephthah came to Mizpah to his house; and, behold, his daughter came out to meet him with tambourines and with dances: and she was his only child; besides her he had neither son nor daughter.

35 It happened, when he saw her, that he tore his clothes, and said, Alas, my daughter! you have brought me very low, and you are one of those who trouble me; for I have opened my mouth to Yahweh, and I can`t go back.

36 She said to him, My father, you have opened your mouth to Yahweh; do to me according to that which has proceeded out of your mouth, because Yahweh has taken vengeance for you on your enemies, even on the children of Ammon.

37 She said to her father, Let this thing be done for me: let me alone two months, that I may depart and go down on the mountains, and bewail my virginity, I and my companions.