Judges 10:17-11:3

17When the Ammonites were called to arms and camped in Gilead, the Israelites assembled and camped at Mizpah. 18The leaders of the people of Gilead said to each other, “Whoever will take the lead in attacking the Ammonites will be head over all who live in Gilead.”

1Jephthah the Gileadite was a mighty warrior. His father was Gilead; his mother was a prostitute. 2Gilead’s wife also bore him sons, and when they were grown up, they drove Jephthah away. “You are not going to get any inheritance in our family,” they said, “because you are the son of another woman.”

3So Jephthah fled from his brothers and settled in the land of Tob, where a gang of scoundrels gathered around him and followed him.