Judges 11:9-11

And Jephthah said unto the elders of Gilead, If ye bring me home again to fight against the children of Ammon, and the LORD deliver them before me, shall I be your head? And the elders of Gilead said unto Jephthah, The LORD be witness between us, if we do not so according to thy words. Then Jephthah went with the elders of Gilead, and the people made him head and captain over them: and Jephthah uttered all his words before the LORD in Mizpeh.