Judges 11:11, 29

So Jephthah returned home with the leaders of Gilead, and the people made him their commander and ruler. Jephthah stated his terms in a solemn ceremony at Mizpah in the presence of YAHWEH.

Then the Spirit of YAHWEH rushed upon Jephthah and empowered him. He and his men marched through Gilead and Manasseh and returned to Mizpah in Gilead, and from there, he stalked the Ammonites.