In November, 1862, President Lincoln quoted the words of Washington to sustain his own views, and announced in a general order that--
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 truth so concisely stated can not be too faithfully regarded, and the pressure to ignore it is far less now than in the midst of war. To recall the kindly and considerate spirit of the orders issued by these great men in the most trying times of our history, and to promote contentment and efficiency, the President directs that Sunday-morning inspection will be merely of the dress and general appearance, without arms; and the more complete inspection under arms, with all men present, as required in paragraph 950, Army Regulations, 1889, will take place on Saturday.
By the President:
Secretary of War.
Benjamin Harrison, Executive Order Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/205689