A resolution calling for a national day of Prayer:
RESOLVED, That a joint committee of both Houses be directed to wait upon the President of the United States, to request that he would recommend to the people of the United States a day of public thanksgiving and prayer, to be observed by acknowledging, with grateful hearts, that many signal favors of almighty God, especially by affording them the opportunity peaceably to establish a Constitution of government for their safety and happiness.
US Congress, 25 Sep 1789
The Bill of Rights hadn't yet been ratified and therefore were not yet the law of the land. Nice try. :)