If the Bible sanctions slavery at all, it is the enslavement of white men. No one pretends that the servants spoken of in the Bible were blacks. The Roman slave was not a black man, the Hebrew slave was not a black man. The question is, whether the laboring man, white or black, may rightfully be enslaved.

As quoted in His Brother's Blood: Speeches and Writings, 1838–64 (2004), edited by William Frederick Moore and Jane Ann Moore, p. 170 - The Fanaticism of the Democratic Party (February 1859)