Proverbs 25:20

"As one that taketh off a garment in cold weather and as vinegar upon soda, So is he that singeth songs to a heavy heart."

"Singing gay songs to a heavy heart is like disrobing a man on a cold day, or adding sour wine to soda."[8] Again, this deals with something that is not appropriate and that will not be appreciated.

Deane noted that the soda mentioned here was `nitrate of potash' or saltpeter. ""It effervesces with an acid such as vinegar and becomes useless."[9] This is indeed a valid illustration of the uselessness of singing gay songs to the disconsolate.