George Washington
At the end of his second term, Washington retired for personal and political reasons, fatigued and disgusted with personal attacks, and to assure a truly contested presidential election could be held. He did not feel bound to a two-term limit, but his retirement ultimately set precedent. The two-term limit to the presidency was formalized with the 1951 adoption of the Twenty-second Amendment to the United States Constitution. Washington is often credited with setting the principal of a two-term presidency, but it was Thomas Jefferson who first refused to run for a third term on political grounds.
Eisenhower's farewell address
On January 20, 1961, Eisenhower served as a president for two full terms, making a total of eight years, and was the first U.S. president to be term-limited from seeking re-election again. He had overseen a period of considerable economic expansion, even as the Cold War deepened. Three of his national budgets had been balanced, but spending pressures mounted. The recent presidential election had resulted in the election of John F. Kennedy, and the oldest American president in a century was about to hand the reins of power to the youngest elected president.