You may have heard that quote before, but have you asked yourself just what Ben Franklin was getting at? Well, the long, tiresome and often contentious convention had almost ended with nothing, with members going back to their home states angry and bitter. In the midst of apparent breakdown and failure, it was Franklin himself who stood up and proposed that starting the next morning, the convention should open with prayer and a sermon, because it was obvious that their momentous objective could not be achieved without the direct intervention of God, the One all the attendees credited with their very existence.
And starting from the very next day, after the morning prayers and sermons, the Constitution was brought to final form and agreed to. It was unlike any document in history, purporting to guarantee every citizen equality, possibility, security and liberty.
Nope there were no official prayers or sermons at the Constitutional Convention. They did not act on Franklin's call to prayer. And there was no three day recess as some sources have erroneously reported. They got on with secular business.
George Washington had declared, "Religion and morality are the twin pillars of freedom."
This is likely a paraphrase of Washington's farewell address. The problem is Boone put it in quotes as though those were Washington's actual words when they weren't.