Judges 11:8-11

8And the elders of Gilead said unto Jephthah, Therefore are we turned again to thee now, that thou mayest go with us, and fight with the children of Ammon; and thou shalt be our head over all the inhabitants of Gilead. 9And 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? 10And the elders of Gilead said unto Jephthah, Jehovah shall be witness between us; surely according to thy word so will we do. 11Then 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.