And they possessed all the coasts of the Amorites, from Arnon even unto Jabbok, and from the wilderness even unto Jordan.
So now the LORD God of Israel hath dispossessed the Amorites from before his people Israel, and shouldest thou possess it?
Wilt not thou possess that which Chemosh thy god giveth thee to possess ? So whomsoever the LORD our God shall drive out from before us, them will we possess .
And now art thou any thing better than Balak the son of Zippor, king of Moab? did he ever strive against Israel, or did he ever fight against them,
While Israel dwelt in Heshbon and her towns, and in Aroer and her towns, and in all the cities that be along by the coasts of Arnon, three hundred years? why therefore did ye not recover them within that time?
Wherefore I have not sinned against thee, but thou doest me wrong to war against me: the LORD the Judge be judge this day between the children of Israel and the children of Ammon.
Howbeit the king of the children of Ammon hearkened not unto the words of Jephthah which he sent him.
Then the Spirit of the LORD came upon Jephthah, and he passed over Gilead, and Manasseh, and passed over Mizpeh of Gilead, and from Mizpeh of Gilead he passed over unto the children of Ammon.
And Jephthah vowed a vow unto the LORD, and said , If thou shalt without fail deliver the children of Ammon into mine hands,
Then it shall be, that whatsoever cometh forth of the doors of my house to meet me, when I return in peace from the children of Ammon, shall surely be the LORD'S, and I will offer it up for a burnt offering.
References for Judges 11:31
So Jephthah passed over unto the children of Ammon to fight against them; and the LORD delivered them into his hands.