Deuteronomy 1:29-40 -

Moses endeavored to rouse the drooping courage of the people, and persuade them to go up by reminding them that God, who was with them, would go before them, and fight for them as he had often done before; but without success, so that God was angry with them, and forbade their entrance into Canaan. This is not mentioned in Numbers, probably because Moses' appeal was unsuccessful. The whole of that generation was bound to fall in the wilderness, except Caleb and Joshua; only their children should enter the Promised Land.