Foundation, a place in the open desert wastes on the east of
Jordan (Judg. 8:10), not far beyond Succoth and Penuel, to the
south. Here Gideon overtook and routed a fugitive band of
Midianites under Zeba and Zalmunna, whom he took captive.
Smith's Dictionary
(foundation), the place in which Zebah and Zalmunna were again routed by Gideon, (Judges 8:10) must have been on the east of Jordan.