'Sour Grapes' in the Bible

In those days they shall not say any more, The fathers have eaten sour grapes, and the teeth of the sons are dull.

But every man shall die in his iniquity. Every man who eats the sour grapes, his teeth will be dull.

What is it to you that you use this proverb concerning the land of Israel, saying, The fathers have eaten sour grapes and the teeth of the sons are dull?