“Eat, drink and be merry” is a biblical saying. “Eat, drink and be thankful"is a popular Thanksgiving saying that has been printed on many GIFs.
“Eat, drink and be thankful to-day. Remember to-day is Thanksgiving” was published in a Kansas newspaper in 1882.
30 November 1882, The Daily Journal (Lawrence, KS), pg. 8, col. 1:
Eat, drink and be thankful to-day.
Remember to-day is Thanksgiving.
20 November 1886, Coffeyville (KS) Journal, pg. 2, col. 2:
The dinner to be given by the Ladies’ Aid Society, at Barndollar’s Hall, on Thanksgiving Day, will be one of the finest and most substantial ever spread before the generous people of Coffeyville. (...) Eat, drink and be thankful.
20 November 1887, Hutchinson (KS) Daily News, pg. 2, col. 1:
Why will the papers keep reminding us that congress is to meet directly after Thanksgiving. Let the people eat, drink and be thankful while they may. The trouble will fall upon us soon enough.
29 November 1888, Saint Paul (MN) Daily Globe, pg. 4, col. 1:
EAT, drink and be thankful to-day.
29 November 1906, The Sun (Baltimore, MD), “Sunbeams,” pg. 4, col. 5:
Eat, drink and be thankful!
8 December 1908, The Evening Star (Washington, DC), “Be Thankful Makes Backers That Way,” pg. 15, col. 4:
When the horse won his backers lined up their friends in the cafe and restaurant with this slogan: “Eat, drink and be thankful!”
Bob M. Montgomery
Happy Thanksgiving fellow Americans. Eat, drink and be thankful.
7:03 AM - 27 Nov 2008
GOBBLE GOBBLE Happy Thanksgiving! Eat, drink and be thankful.
8:28 AM - 27 Nov 2008
Eat, drink and be thankful! Happy Thanksgiving!
9:30 PM - 24 Nov 2016 from Jackson, TN
Happy Thanksgiving to all our American friends! Celebrate, eat, drink and be thankful #thanksgiving #kitchen… http://fb.me/1oyeFJ5I2
1:33 AM - 25 Nov 2016