Translation:
A man goes into the coffee room at the House of Study and sees a sign:
"Do not bring coffee into the study hall, see [a certain section of a certain
volume of the Code of Jewish Law]." The man is learned, but tries without
success to think of what could be written there about coffee in a study hall.
He enters the study hall, takes out the volume, and turns to [the section in
question], where he finds a large coffee stain.
