Judges 11:38

‘ And he said, “Go.” And he sent her away for two moon periods. And she departed, she and her companions, and she bewailed her virginity on the mountains.'

Jephthah granted her request immediately. And she left him and prepared herself for what was to come, on the mountains, and faced up to her coming lifetime virginity. She remained there for two moon periods. She would be a symbol of what Israel should be, and a contrast with the Canaanite cult prostitutes. But we should note that it was due to her father's rash vow rather than because Yahweh desired it. Yet Yahweh would use it for good.