Judges 11:39

And it came to pass at the end of two months, that she returned unto her father, who did with her according to his vow which he had vowed: and she knew no man. And it was a custom in Israel,

Did with her — Jephthah's daughter was not sacrificed, but only devoted to perpetual virginity. This appears, 1. From verse37,38, where we read, that she bewailed not her death, which had been the chief cause of lamentation, if that had been vowed, but her virginity: 2. From this verse39, where, after he had said, that he did with her according to his vow; he adds, by way of declaration of the matter of that vow, and she knew no man. It is probably conceived, that the Greeks, who used to steal sacred histories, and turn them into fables, had from this history their relation of Iphigenia (which may be put for Jephtigenia) sacrificed by her father Agamemnon, which is described by many of the same circumstances wherewith this is accompanied.