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 law, religion or tranquility of Musselmen; and as the states never have entered into any war or act of hostility against any Mohometan nation, it is declared by the parties that no pretext arising from religious opinion shall ever produce an interruption of harmony existing between the two countries.
– 1797 Treaty of Tripoli Article 11