The bible verse alluded to at the bottom of this page is Luke 12:47. Ironically, the two verses that proceed it read:

But and if that servant say in his heart, My lord delayeth his coming; and shall begin to beat the menservants and maidens, and to eat and drink, and to be drunken;

The lord of that servant will come in a day when he looketh not for him, and at an hour when he is not aware, and will cut him in sunder, and will appoint him his portion with the unbelievers.

So even though Captain Auld referenced this passage to justify his treatment of black people, the chapter could be said to convict him, a purported servant of God who will be punished by his “lord” for beating other servants.