May 09, 1864
To the Friends of the Union and Liberty:
Enough is known of the army operations within the last five days to claim our especial gratitude to God, while what remains undone demands our most sincere prayers to and reliance upon Him, without whom all human efforts are in vain. I recommend that all patriots, at their homes, in their places of public worship, and wherever they may be, unite in common thanksgiving and prayer to Almighty God.
Abraham Lincoln, Executive Order Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/202532