For those interested, it's in Article 1 Section 9:
(I) The importation of negroes of the African race from any foreign country other than the slaveholding States or Territories of the United States of America, is hereby forbidden; and Congress is required to pass such laws as shall effectually prevent the same.
(2) Congress shall also have power to prohibit the introduction of slaves from any State not a member of, or Territory not belonging to, this Confederacy.
Thanks I'm gonna share this with everyone I know!
For those interested, it's in Article 1 Section 9:
Thanks, Kek!