Executive Order—General Order Respecting the Observance of the Sabbath Day in the Army and Navy
The President, Commander in Chief of the Army and Navy, desires and enjoins the orderly observance of the Sabbath by the officers and men in the military and naval service. The importance for man and beast of the prescribed weekly rest, the sacred rights of Christian soldiers and sailors, a becoming deference to the best sentiment of a Christian people. and a due regard for the divine will demand that Sunday labor in the Army and Navy be reduced to the measure of strict necessity.
The discipline and character of the national forces should not suffer nor the cause they defend be imperiled by the profanation of the day or name of the Most High. "At this time of public distress," adopting the words of Washington in 1776, "men may find enough to do in the service of God and their country without abandoning themselves to vice and immorality." The first general order issued by the Father of his Country after the Declaration of Independence indicates the spirit in which our institutions were rounded and should ever be defended:
The General hopes and trusts that every officer and man will endeavor to live and act as becomes a Christian soldier defending the dearest rights and liberties of his country.
Abraham Lincoln, Executive Order—General Order Respecting the Observance of the Sabbath Day in the Army and Navy Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/202685