Judges 11:9-11

And Jephthah said unto the elders of Gilead, If ye bring me home again to fight with the children of Ammon, and Jehovah deliver them before me, shall I be your head? And the elders of Gilead said unto Jephthah, Jehovah shall be witness between us; surely according to thy word so will we do. Then Jephthah went with the elders of Gilead, and the people made him head and chief over them: and Jephthah spake all his words before Jehovah in Mizpah.