Numbers 32:20-22

American Standard Version

²⁰ And Moses said unto them, If ye will do this thing, if ye will arm yourselves to go before Jehovah to the war, ²¹ and every armed man of you will pass over the Jordan before Jehovah, until he hath driven out his enemies from before him, ²² and the land is subdued before Jehovah; then afterward ye shall return, and be guiltless towards Jehovah, and towards Israel; and this land shall be unto you for a possession before Jehovah.