Lupus in Fabula?

[rustymason]

Salvete Omnes,

I have heard that "lupus in fabula" (the wolf in the story) is used to mean "speak of the devil (and he will appear)."
Estne vero? Do you know the source?

Valete,
Caementarius Robiginosus.

[thesaurus]

Here is a quick rundown on the proverb:

http://audiolatinproverbs.blogspot.com/ ... abula.html

Cicero, Terence, and Plautus use it, so It seems like it's older than the hills (to use another proverb).