Numbers 32:20-22

Revised Standard Version

²⁰ So Moses said to them, “If you will do this, if you will take up arms to go before the Lord for the war, ²¹ and every armed man of you will pass over the Jordan before the Lord, until he has driven out his enemies from before him ²² and the land is subdued before the Lord; then after that you shall return and be free of obligation to the Lord and to Israel; and this land shall be your possession before the Lord.