'River' in the Bible

Solomon ruled over all the kingdoms from the River to the land of the Philistines, and to the border of Egypt: they brought tribute, and served Solomon all the days of his life.

For he had dominion over all [the region] on this side the River, from Tiphsah even to Gaza, over all the kings on this side the River: and he had peace on all sides around him.

For Yahweh will strike Israel, as a reed is shaken in the water; and he will root up Israel out of this good land which he gave to their fathers, and will scatter them beyond the River, because they have made their Asherim, provoking Yahweh to anger.