Numbers 32:30

²⁸So concerning them Moses commanded Eleazar the priest, and Joshua the son of Nun, and the chief fathers 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 Jordan, every man armed to battle, before the LORD, and the land shall be subdued before you; then ye shall give them the land of Gilead for a possession:

— Numbers 32:30 —

³¹And the children of Gad and the children of Reuben answered, saying, As the LORD hath said unto thy servants, so will we do.

³²We will pass over armed before the LORD into the land of Canaan, that the possession of our inheritance on this side Jordan may be ours.