Brigham speaks on the need to treat "the seed of Cain" well as servants.
Brigham Young, Speech, February 5, 1852, Brigham Young Office Files
It is a great blessing to the seed of Adam to have the seed of Cain for servants, but those they serve should use them with all the heart and feeling, as they would use their own children, and their compassion should reach over them, and round about them, and treat them as kindly, and with that humane feeling necessary to be shown to mortall [sic] beings of the human species. Under these sercumstances [sic] there [sic] blessings in life are greater in proportion than those who have to provide the bread and dinner for them