Moses mistakenly believed that the tribes that wanted to stay on the East side of the Jordan did not want to help their brethren fight in the Land of Canaan, and although mistaken, he did make some good points, if they had planned on not fighting in the wars.
He told them in part,
“Thus your fathers did when I sent them away 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 children of Israel, so that they did not go into the land which the LORD had given them” (Numbers 32:8-9).
Israel wandered in the wilderness because ten men discouraged the heart of the nation, and they believed they could not conquer the land that God had promised to them. Ten men!
Discouragement is powerful. Have you discouraged someone? If so, repent, and do all you can to encourage!