But Moses said to the people of Gad and to the people of Reuben, “Shall your brothers go to the war while you sit here? Why will you discourage the heart of the people of Israel from going over into the land that the Lord has given them? Your fathers did this, 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 heart of the people of Israel from going into the land that the Lord had given them. And the Lord's anger was kindled on that day, and he swore, saying, ‘Surely none of the men who came up out of Egypt, from twenty years old and upward, shall see the land that I swore to give to Abraham, to Isaac, and to Jacob, because they have not wholly followed me, none except Caleb the son of Jephunneh the Kenizzite and Joshua the son of Nun, for they have wholly followed the Lord.’ And the Lord's anger was kindled against Israel, and he made them wander in the wilderness forty years, until all the generation that had done evil in the sight of the Lord was gone. (ESV)