'Beyond the River' in the Bible

And Joshua said to all the people, "Thus says Yahweh the God of Israel: '{Long ago} your ancestors--Terah the father of Abraham and the father of Nahor--lived beyond the river, and they served other gods.

I took your ancestor Abraham from beyond the river and led him through all the land of Canaan, and I increased his offspring; I gave him Isaac,

"So now, revere Yahweh and serve him in sincerity and faithfulness; remove the gods that your ancestors served beyond the river and in Egypt, and serve Yahweh.

But if it is bad in your eyes to serve Yahweh, choose for yourselves today whom you want to serve, whether it is the gods that your ancestors served beyond the river, or the gods of the Amorites in whose land you [are] living; but as for me and my household, we will serve Yahweh."