“May you always have a clean shirt, a clear conscience, and enough coins in your pocket to buy a pint!” is an Irish toast that has been printed on many images. The saying has been cited in print since at least 1999 and is of unknown authorship.
 
       
Newspapers.com
14 March 1999, Naples (FL) Daily News, “Ireland: Fact and Fiction” by Ken Moore, pg. 7B, col. 2:
The outstanding book, however, is, “Irish Blessings: A Photographic Celebration.” (...) Thus, a full page photograph of a village pub is described on its facing page, “May you always have a clean shirt, a clear conscience and a guinea in your pocket.”
 
Google Groups: soc.culture.iranian
Words to live by
F Ashkey
Mar 17, 1999, 3:00:00 AM
(...)
May you always have a clean shirt
and a clear conscience,
A guinea in your pocket
and a lass at your side.
         
Google Groups: alt.fan.rawilso
thanks to rmjon
.(JavaScript must be enabled to view this email address)
Jun 24, 2003, 2:55:39 AM
here here! May you always have a clean shirt, a clear conscience, and enough coins in your pocket to buy a pint!
   
Newspapers.com
17 March 2004, The Tennessean (Nashville, TN), “Toasting Irish,” pg. 2D, col. 2:
May you always have a clean shirt, a clear conscience and enough coins in your pocket to buy a pint!
 
Google Books
With a Pinch of Salt:
A collection of nautical expressions and other stories
By Captain Nick Bates
Suffolk, UK: Seafarer Books
2005
Pg. 15:
May you always have a clean shirt,
A clear conscience,
And a pound in your pocket
     
Twitter
eXPress Travel Photo
@expresstravel
May you always have a clean shirt, a clear conscience, and enough coins in your pocket to buy a pint! - #Irish toast
6:44 PM · Mar 9, 2009·Twitter Web Client
 
Google Books
The Beer Devotional:
A Daily Celebration of the World’s Most Inspiring Beers
By Jess Lebow
Avon, MA: Adams Media
2010
Pg. ?:
May you always have a clean shirt, a clear conscience, and enough coins in your pocket to buy a pint!
 
Google Books
Irish Wit and Wisdom:
Quips and Quotes to Suit All Manner of Occasions
By Richard Benson
Chichester, UK: Summersdale Publishers Ltd,
2016
Pg. ?:
MAY YOU ALWAYS HAVE A CLEAN SHIRT, A CLEAR CONSCIENCE, AND ENOUGH COINS IN YOUR POCKET TO BUY A PINT!
Irish Toast
 
Google Books
Irish Curses, Blessings, and Toasts:
A Little Book of Wit, Wisdom, and Whimsy
By Nicholas Nigro
Charlottesville, VA: Hampton Roads Publishing Company
2018
Pg. 56:
May you always have A clean shirt,
A clear conscience,
And enough coins in your pocket to buy a pint!
     
Twitter
🇧🇷Jackie-A🇧🇷
@JackieIam2U
Replying to @lorrie_e@SookraDavid and 3 others
“May you always have a clean shirt, a clear conscience, and enough coins in your pocket to buy a pint!” – Irish Toast
3:10 PM · Mar 17, 2022·Twitter for Android
 
Twitter
Taylor Freezer of MI
@TaylorFreezerMI
May you always have a clean shirt, a clear conscience, and enough coins in your pocket to buy ice cream! The wisdom of the Irish. Happy St. Patrick’s Day! #foodservice
3:21 PM · Mar 17, 2022·Sendible