Like a bad tooth or a lame foot is trust in a faithless person in time of trouble.
Like vinegar on a wound is one who sings songs to a heavy heart. Like a moth in clothing or a worm in wood, sorrow gnaws at the human heart.
References for Proverbs 25:20
If your enemies are hungry, give them bread to eat; and if they are thirsty, give them water to drink;
for you will heap coals of fire on their heads, and the Lord will reward you.
The north wind produces rain, and a backbiting tongue, angry looks.
It is better to live in a corner of the housetop than in a house shared with a contentious wife.
Like cold water to a thirsty soul, so is good news from a far country.
Like a muddied spring or a polluted fountain are the righteous who give way before the wicked.
It is not good to eat much honey, or to seek honor on top of honor.
Like a city breached, without walls, is one who lacks self-control.