“The potato farmer who crossed the mob is sleeping with the knishes”

“Sleeping with the fishes” is a mob term meaning that someone will be killed (that is, the body will be dumped in the water to “sleep with the fishes”). A joke was posted on Reddit on July 20, 2016:
 
“Did you hear about the potato farmer who crossed the mob? He’s sleeping with the knishes.”
 
“Sleep with the knishes”—without this full joke—has been cited in print since at least 1998.
 
 
Google Groups: alt.gathering.rainbow
CRUSTY SAINTED
Crusty
10/31/98
Ah Ha! Now we know who’s been destroying the forests and ruining the ecology.
Repent or face an offer you can’t refuse Morphun Micky (aka Popeye).
Sleep with the knishes.
   
Google Groups: alt.gathering.rainbow
Morphioso Hit
.(JavaScript must be enabled to view this email address)
4/20/99
(...)
You can hide but you can’t slide.
 
Sleep with the knishes!
 
Twitter
Ed Kaz!
‏@EdKaz
would much rather owe money to the Jewish Mafia. Sleeping with the knishes can’t be that bad.
5:25 PM - 8 Nov 2009
 
Twitter
darksidedeb
‏@darksidedeb
#RejectedPopularSayings Sleep with the knishes.
8:52 PM - 17 Nov 2014
 
reddit
Did you hear about the potato farmer who crossed the mob? (self.dadjokes)
submitted July 20, 2016 by xwhy
He’s sleeping with the knishes.
 
The Amazingly Lame Joke of the Day
Saturday, July 23, 2016
What happened to the potato farmer who crossed the mob?
He’s sleeping with the knishes.
Posted by Tim Wycislak at 4:26 AM