Judges 12:2-3

2And Jephthah said to them, “My people and I were in a major conflict with the Ammonites, and when I called you [for help], you did not rescue me from their hand.

3So when I saw that you were not coming to help me, I took my life in my hands and crossed over against the Ammonites, and the Lord handed them over to me. So why have you come up to me this day to fight against me?”