“Moreover also I lifted up my hand to them in the wilderness, that I would not bring them into the land that I had given them, flowing with milk and honey, which is the glory of all lands.”
This is the reversal of Ezekiel 20:6. He who had sworn to them to bring them out of Egypt into the good land He had prepared for them, now lifted up His hand and swore that those of that generation would not enter it (Numbers 32:10-13). The land that that generation had so looked forward to seeing was lost to them forever. God's favours are conditional on obedience.