Institute on the Constitution Uses Spurious George Washington Quote to Mislead Followers

The Institute on the Constitution, founded by former League of the South board member Michael Peroutka, bills itself as an educational outreach of Peroutka’s law firm. I have contended for over a year that the IOTC is a theocratic enterprise which does not educate but rather misleads followers about the Constitution.
Today I note an illustration of how the IOTC subtly misinforms followers. On their Facebook page, the IOTC attributes to George Washington the following spurious quote:

It is impossible to rightly govern a nation without God and the Bible

According to the IOTC Facebook page, this post has been shared 66 times. That is a lot of ignorance going around.
According to Mt. Vernon website, there is no evidence that Washington ever said this.  The exact quote has never been located in Washington’s works. A similar quote was first included, without citation, in an book published long after Washington’s death. There is no evidence he ever said this.
This is not the first fake Washington quote used by the IOTC to advance their agenda.
The IOTC course on the Constitution is riddled with errors and cannot be trusted as a source on the subject. In addition, the IOTC has posted material on the organization’s website defending racial and religious discrimination. Peroutka believes the wrong side won the Civil War.
The IOTC is making a strong push to establish what they call “American Clubs” in public schools. In my view, these clubs are dangerous and should be resisted by parents. It is beyond disgusting that the Liberty Counsel, affiliated with Liberty University, defends the American Clubs in school districts who attempt to resist them.