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.
1.    Jephthah offered her as a human sacrifice (burnt offering) to Yahweh. [Note: Advocates of this view include Josephus, 5:7:10; several early church fathers; Davis, p. 147; F. F. Bruce, "Judges," in New Bible Commentary, p. 250; Cundall and Morris, p. 148; Bright, p. 159; Davis and Whitcomb, p. 128; Matthew Henry, Commentary on the Whole Bible, 2:197; Wolf, p. 456; Lewis, p. 68; J. Gray, p. 319; Block, Judges . . ., pp. 367-68; McCann, p. 84; Howard, p. 117; Robert B. Chisholm Jr., "The Ethical Challenge of Jephthah’s Fulfilled Vow," Bibliotheca Sacra 167:668 (October-December 2010):404-22; et al.] 