Numbers 32:18-33
We will not return unto our houses, until the children of Israel have inherited every man his inheritance.For we will not inherit with them on the other side of the Jordan, and forward; because our inheritance is fallen to us on this side of the Jordan eastward.And Moses said unto them, If ye will do this thing, if ye will arm yourselves to go before Jehovah to the war,and every armed man of you will pass over the Jordan before Jehovah, until he hath driven out his enemies from before him,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.But if ye will not do so, behold, ye have sinned against Jehovah; and be sure your sin will find you out.Build you cities for your little ones, and folds for your sheep; and do that which hath proceeded out of your mouth.And the children of Gad and the children of Reuben spake unto Moses, saying, Thy servants will do as my lord commandeth.Our little ones, our wives, our flocks, and all our cattle, shall be there in the cities of Gilead;but thy servants will pass over, every man that is armed for war, before Jehovah to battle, as my lord saith.So 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.And 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:but if they will not pass over with you armed, they shall have possessions among you in the land of Canaan.And the children of Gad and the children of Reuben answered, saying, As Jehovah hath said unto thy servants, so will we do.We will pass over armed before Jehovah into the land of Canaan, and the possession of our inheritance shall remain with us beyond the Jordan.And Moses gave unto them, even to the children of Gad, and to the children of Reuben, and unto the half- tribe of Manasseh the son of Joseph, the kingdom of Sihon king of the Amorites, and the kingdom of Og king of Bashan, the land, according to the cities thereof with their borders, even the cities of the land round about.