Numbers 32:18-22

We will not return to our homes until every one of the sons of Israel has gained possession of his inheritance.

But we will not have an inheritance with them on the other side of the Jordan and beyond, because our inheritance has come to us on this side of the Jordan toward the east.”

So Moses said to them, “If you will do this, if you will arm yourselves before the Lord for the war,

and all of you armed men cross over the Jordan before the Lord until He has driven His enemies out from Him,

and the land is subdued before the Lord, then afterward you may return and be free of obligation toward the Lord and toward Israel, and this land shall be yours as property before the Lord.