'Sour' in the Bible
All the days of his separation you will not eat from anything that is made from the grapevine, from sour grapes to the skin [of grapes].
At mealtime Boaz said to her, “Come over here and eat some bread and dip your bread in the vinegar.” So she sat beside the reapers; and he served her roasted grain, and she ate until she was satisfied and she had some left [for Naomi].
Like a vine he will let his sour grapes fall, and like an olive tree he will shed his blossoms.
his food is turned sour in his stomach; it becomes the venom of serpents within him.
when my paths were washed in sour milk, and [the] rock poured out streams of oil for me.
He built a hedge around it, removed its stones, and planted a vine. He built a tower in the middle of it, and constructed a winepress. He waited for it to produce edible grapes, but it produced sour ones instead.
What more can I do for my vineyard beyond what I have already done? When I waited for it to produce edible grapes, why did it produce sour ones instead?
He will eat sour milk and honey, which will help him know how to reject evil and choose what is right.
From the abundance of milk they produce, he will have sour milk for his meals. Indeed, everyone left in the heart of the land will eat sour milk and honey.
For afore the harvest, when the bud is perfect, and the sour grape is ripening in the flower, he shall both cut off the sprigs with pruning hooks, and take away and cut down the branches.
In those days they shall say no more, The fathers have eaten a sour grape, and the children's teeth are set on edge.
But every one shall die for his own iniquity: every man that eateth the sour grape, his teeth shall be set on edge.
What mean ye, that ye 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 is sour: they have committed whoredom continually: her rulers with shame do love, Give ye.