en_tn_condensed/deu/03/20.md

Yahweh gives rest to your brothers

"Yahweh allows your brothers to rest" or "Yahweh allows your brothers to stop fighting wars and live peacefully"

beyond the Jordan

"east of the Jordan River". This refers to the land across the Jordan River, to the east of Israel. Moses was east of the Jordan when he said this. See how you translated these words in Deuteronomy 1:1.

then will you return

"only then are you to return.". Moses is emphasizing that the other tribes must possess their land before Yahweh will permit these three tribes to possess their land.