When I saw that you didn't save me, I put my life in my hand, and passed over against the children of Ammon, and Yahweh delivered them into my hand: why then are you come up to me this day, to fight against me?
Unfortunately Jephthah treated his own brethren, the Ephraimites, as he had dealt with Israel’s enemy, the Ammonites. He unleashed his zeal and took vengeance far out of proportion to what might have been legitimate.