“Virtue is its own reward” is an old saying. “A good pun is its own reword” is a jocular saying that has been printed on many images.
“A good pun is its own reword” was printed in Omni magazine in 1986 and in the book Money Talks, But Mine Just Says Goodbye: More bumper stickers from the information highway (1996) by Arthur Goldstuck and William Ramwell.
Wiktionary: virtue is its own reward
Phrase
virtue is its own reward
1. a good deed is its own reward
1726, William De Britaine, Human Prudence; or, The Art by Which a Man May Raiſe Himſelf and His Fortune to Grandeur, 12th edition (Dublin: Samuel Fairbrother), § XII: “Of Virtue”, page 73
The Wages of Sin is Death; it’s poor Wages that will not make a Man live; as Virtue is its own Reward, ſo Sin is its own Executioner.
Google Books
Omni
Volume 8
1986
Pg. 112:
A good pun is its own reword.
Google Books
Money Talks, But Mine Just Says Goodbye:
More bumper stickers from the information highway
By Arthur Goldstuck and William Ramwell
Johannesburg, South Africa: Zebra
1996
Pg. 60:
Remember , a good pun is its own reword.
Newspapers.com
10 November 1997, Atlanta (GA) Journal-Constitution, “The Vent,” pg. B2, col. 1:
A good pun is its own reword.
Newspapers.com
28 July 1998, Vancouver (BC) Sun, “City Limits,” pg. B5, col. 5:
A good pun is its own reword.
Google Groups: comp.sys.hp.mpe
OT: A GOOD PUN IS ITS OWN REWORD
Larry Barnes
Jan 16, 2003, 4:31:51 PM
Enjoy: The week-end is near.
* A GOOD PUN IS ITS OWN REWORD
Twitter
HawaiiSEO
@HawaiiSEO
Thought for the day: “A good pun is its own reword.”
3:51 PM · Jan 18, 2008·Twitter Web Client
Twitter
Dustin King
@cathodion
“A good pun is its own reword.”—somebody’s sig on XKCD forums
8:00 AM · Aug 11, 2008·Twitter Web Client
Twitter
Pace
@DubiousByName
Here is a #ThrowbackThursday post.
“A good pun is its own reword.”
#WritingCommunity #poetry #writing #poem #Writers #puns #joke #humor #pun
1:46 AM · Jan 17, 2020·Twitter Web App
Reddit—Oneliners
Posted by u/andersonfmly August 13, 2020
A good pun is its own reword.