Judges 11:5-9

5And when the children of Ammon made war against Israel, the elders of Gilead went to fetch Jephthah out of the land of Tob.

6And they said to Jephthah, Come, and be our captain, that we may fight against the children of Ammon.

7And Jephthah said to the elders of Gilead, Did not ye hate me, and expel me out of my father's house? and why are ye come to me now when ye are in trouble?

8And the elders of Gilead said to Jephthah, Therefore we have returned to thee now, that thou mayest go with us, and fight against the children of Ammon, and be head over all of us the inhabitants of Gilead.

9And Jephthah said to the elders of Gilead, If ye take me back to fight against the children of Ammon, and Jehovah give them up before me, shall I be your head?