Numbers 32:20–32

²⁰And Moses said unto them, If ye will do this thing, if ye will arm yourselves to go before Jehovah to the war, ²¹and every armed man of you will pass over the Jordan before Jehovah, until he hath driven out his enemies from before him, ²²and 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. ²³But if ye will not do so, behold, ye have sinned against Jehovah; and be sure your sin will find you out. ²⁴Build you cities for your little ones, and folds for your sheep; and do that which hath proceeded out of your mouth. ²⁵And the children of Gad and the children of Reuben spake unto Moses, saying, Thy servants will do as my lord commandeth. ²⁶Our little ones, our wives, our flocks, and all our cattle, shall be there in the cities of Gilead; ²⁷but thy servants will pass over, every man that is armed for war, before Jehovah to battle, as my lord saith.

²⁸So Moses gave charge concerning them to Eleazar the priest, and to Joshua the son of Nun, and to the heads of the fathers’ houses of the tribes of the children of Israel. ²⁹And Moses said unto them, If the children of Gad and the children of Reuben will pass with you over the Jordan, every man that is armed to battle, before Jehovah, and the land shall be subdued before you; then ye shall give them the land of Gilead for a possession: ³⁰but if they will not pass over with you armed, they shall have possessions among you in the land of Canaan. ³¹And the children of Gad and the children of Reuben answered, saying, As Jehovah hath said unto thy servants, so will we do. ³²We will pass over armed before Jehovah into the land of Canaan, and the possession of our inheritance shall remain with us beyond the Jordan.