The Republican National Committee on Sunday tweeted a quote wrongly attributed to Abraham Lincoln in a post celebrating the former president's birthday.

"His leadership brought us together; his legacy inspires us still. Happy Birthday, President Lincoln!" the tweet on the GOP read.

The tweet included an image with the quote: "And in the end, it's not the years in your life that count. It's the life in your years."

His leadership brought us together; his legacy inspires us still. Happy Birthday, President Lincoln! pic.twitter.com/W2rXcKHVpu — GOP (@GOP) February 12, 2017

According to Quote Investigator, there is no "substantive evidence that Lincoln used the expression."

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The website said it found the earliest use of the adage in an advertisement for a 1947 book by Edward J. Stieglitz.

Stieglitz was credited with using the phrase in a 1949 column in the Hartford Courant newspaper.

The site said it would "tentatively credit" Stieglitz with the use of the saying.