'Sour Grapes' in the Bible

“In those days, it will never again be said:The fathers have eaten sour grapes,and the children’s teeth are set on edge.

Rather, each will die for his own wrongdoing. Anyone who eats sour grapes—his own teeth will be set on edge.

“What do you mean by using this proverb concerning the land of Israel:The fathers eat sour grapes,and the children’s teeth are set on edge?