Judges 12:2-3

2Then Jephthah said to them, “My people and I had a bitter conflict with the Ammonites. So I called for you, but you didn’t deliver me from their power.

3When I saw that you weren’t going to deliver me, I took my life in my own hands and crossed over to the Ammonites, and the Lord handed them over to me. Why then have you come today to fight against me?”