Seeing that advice regularly now, today I decided to look it up.
One internet reference claimed that the phrase was first documented in The New Centurions, back in 1972. If I've ever seen it before, I've forgotten about it, but - fortunately - it is still available.
<https://www.youtube.com/watch?v=y9xfbPIktUI>
<https://www.youtube.com/watch?v=IS0R-a_8nbo>