Remember what Moses the servant of the Lord commanded you, saying, The Lord your God is giving you [of these two and a half tribes a place of] rest and will give you this land [east of the Jordan].
And Moses said to them, If the sons of Gad and Reuben will pass with you over the Jordan, every man armed to battle before the Lord, and the land shall be subdued before you, then you shall give them the land of Gilead for a possession.