TSK · Deuteronomy 3:17

These last five kings joined forces in the Valley of Siddim(that is, the Salt Sea).

So Balak brought Balaam to the field of Zophim, to the top of Pisgah, where he built seven altars and offered a bull and a ram on each altar.

including all the rift valley of the Transjordan in the east to the sea of the rift valley, beneath the slopes of Pisgah.)

His kingdom included the eastern rift valley from the Sea of Kinnereth to the sea of the rift valley(the Salt Sea), including the route to Beth Jeshimoth and the area southward below the slopes of Pisgah.

Their southern border started at the southern tip of the Salt Sea,

It then crossed to the slope of Beth Hoglah to the north and ended at the northern tip of the Salt Sea at the mouth of the Jordan River. This was the southern border.