'Sour' in the Bible

In those days they shall say no more, The fathers have eaten sour grapes, and the children's teeth are set on edge.

But everyone shall die for his own iniquity: every man who eats the sour grapes, his teeth shall be set on edge.

What do you mean, that you use this proverb concerning the land of Israel, saying, The fathers have eaten sour grapes, and the children's teeth are set on edge?

Their drink has become sour. They play the prostitute continually. Her rulers dearly love their shameful way.

They gave him sour wine to drink mixed with gall. When he had tasted it, he would not drink.