“The hand of the Lord was against them, to destroy them . . . until all the generation of the men . . . were wasted out from among the host” (Deuteronomy 2:15, 14). Here is some of the strongest language in all the Bible regarding unbelief.
You may say, “But that isn’t the language of grace. God doesn’t deal that severely with unbelief today.” Not true. The Bible says that today, under grace, “without faith it is impossible to please him; for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him” (Hebrews 11:6).