As the government of the United States is not, in any sense, founded on the Christian Religion,—as it has in itself no character of enmity against the laws, religion or tranquility of Musselmen … it is declared … that no pretext arising from religious opinions shall ever produce an interruption of the harmony existing between the two countries.

Article 11 of the Treaty of Tripoli (signed at Tripoli on November 4, 1796, and at Algiers on January 3, 1797 and received ratification unanimously from the U.S. Senate on June 7, 1797; it was signed into law by John Adams (the original language is by Joel Barlow, U.S. Consul); This phrase has also sometimes been misattributed to George Washington, and has also been misquoted as "This nation of ours was not founded on Christian principles".