Ruth 2:14
And Boaz said to her, At mealtime come you here, and eat of the bread, and dip your morsel in the vinegar. And she sat beside the reapers: and he reached her parched corn, and she did eat, and was sufficed, and left.
Nave's Topical Index—AKJV

Psalm 69:21
They gave me also gall for my meat; and in my thirst they gave me vinegar to drink.
Nave's Topical Index—AKJV

Proverbs 10:26
As vinegar to the teeth, and as smoke to the eyes, so is the sluggard to them that send him.
Nave's Topical Index—AKJV

Proverbs 25:20
As he that takes away a garment in cold weather, and as vinegar on nitre, so is he that singes songs to an heavy heart.
Nave's Topical Index—AKJV