text from the emancipation proclamation:

“That on the 1st day of January, A.D. 1863, all persons held as
slaves within any State or designated part of a State the people
whereof shall then be in rebellion against the United States shall
be then, thenceforward, and forever free; and the executive
government of the United States, including the military and naval
authority thereof, will recognize and maintain the freedom of such
persons and will do no act or acts to repress such persons, or any
of them, in any efforts they may make for their actual freedom.