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?
Now look, notice, Jephthah was a very egocentric person. Notice all the I's and the my's and so forth in these next few verses. It demonstrates the guy's egocentricities.