Harry Truman actually said...

There are hereby excluded from the functions delegated by section 1(a) of this order:

Let us all on that day, in our homes and in our places of worship, individually and in groups, render homage to Almighty God.

Let us recall the words of the Psalmist, 'O give thanks unto the Lord; for He is good: for His mercy endureth forever.'

I am mindful of the reason which you have advanced for declining a recess appointment, and I reluctantly defer to your wishes in the matter.