The irony of it: the first known use of the phrase according to Wikipedia is associated with Benjamin Franklin.
https://en.wikipedia.org/wiki/In_God_We_Trust
"The earliest recorded usage of the motto in English was in January 1748, when The Pennsylvania Gazette reported on the colours of Associators regiments, namely that of Benjamin Franklin's Pennsylvania militia, one of which said: "IX. A Coronet and Plume of Feathers. Motto, In God we Trust."[17][18][19]"