Jephthah made a hasty promise and then blamed his daughter for the outcome. He did not consider the guidance of Scripture. Vows were usually unbreakable (Numbers 30:2), but the Old Testament allows exceptions for unwise vows (Numbers 30:6–8). Since the law forbade human sacrifice, he could have offered a substitute (Leviticus 27:1–8). Jephthah likely did not know these laws, possibly due to his upbringing far from Israel's main centers.