Many a true word is spoken in jest

Many a true word is spoken in jest.

 and There's many a true word spoken in jest.
Prov. Just because something is said as a joke, it can still be true. Fred: Why did you make a joke about my being stingy? Do you really think I'm cheap? Ellen: Of course not, don't be silly. It was just a joke. Fred: But many a true word is spoken in jest.
See also: jest, many, spoken, true, word
References in periodicals archive ?
THEY say that many a true word is spoken in jest but the Giants pathetic lack of performance on Saturday was a testament to that phrase.
SIR - As they say, many a true word is spoken in jest.