But Moses said to the sons of Gad and the sons of Reuben, “Shall your brothers go to war while you sit here? Now why are you discouraging the hearts of the Israelites from crossing over into the land which the LORD has given them? This is what your fathers did when I sent them from Kadesh-barnea to see the land! For when they went up to the Valley of Eshcol and saw the land, they discouraged the hearts of the Israelites so that they did not go into the land which the LORD had given them. And the LORD’S anger was kindled on that day and He swore an oath, saying, ‘None of the men who came up from Egypt, from twenty years old and upward, shall see the land which I promised to Abraham, to Isaac, and to Jacob, because they have not followed Me completely, except Caleb the son of Jephunneh the Kenizzite and Joshua the son of Nun, for they have followed the LORD completely.’ So the LORD’S anger was kindled against the sons of Israel (Jacob) and He made them wander in the wilderness forty years, until the entire generation of those who had done evil in the sight of the LORD was destroyed. Now look, you [the tribes of Reuben and Gad] have risen up in your fathers’ place, a brood of sinful men, to add still more to the fierce anger of the LORD against Israel. For if you turn back from following Him [completely], He will once again leave them in the wilderness, and you will destroy all these people.”
But the people of Reuben and Gad approached Moses and said, “We will build sheepfolds here for our flocks and [walled] cities for our children, but we will be armed and ready to go to war before the [other tribes of the] Israelites, until we have brought them to their place, while our children live in the fortified cities because of the inhabitants of the land. We will not return to our homes until every one of the [other] sons of Israel has taken possession of his inheritance. For we will not inherit with them on the west side of the Jordan and beyond, because our inheritance has come to us on this side of the Jordan [River] toward the east.”
Moses replied, “If you will do as you say, if you will arm yourselves before the LORD for war, and every armed man of yours will cross the Jordan before the LORD until He has driven out His enemies before Him, and the land [west of the Jordan] is subdued before the LORD, then afterward you shall return and be blameless [in this matter] before the LORD and before Israel, and this land [east of the Jordan] shall be yours as a possession before the LORD. But if you do not do this, behold, you will have sinned against the LORD; and be sure that your sin will find you out.