From Treaty of Tripoli:

As the Government of the United States of America 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 Mussulmen [Muslims],—and as the said States never entered into any war or act of hostility against any Mahometan [Mohammedan] nation, it is declared by the parties that no pretext arising from religious opinions shall ever produce an interruption of the harmony existing between the two countries.

signed at Tripoli in 1796, submitted to the Senate by President John Adams in January 1797, ratified unanimously. Do I need to point out, that most of the Senators at that time were actual Founders? Like they’d signed the Declaration of Independence, attended the Constitutional Convention and helped write it, etc?