Classicly

Is Slavery Sanctioned by the Bible? is a biblical argument against slavery write by Isaac Allen during the year 1860.

Excerpts:

If there is one subject which, above all others, may be regarded as of national interest at the present time, it is the subject of Slavery. Wherever we go, north or south, east or west, at the fireside, in the factory, the rail-car or the steamboat, in the state legislatures or the national Congress, this "ghost that will not down" obtrudes itself. The strife has involved press, pulpit, and forum alike, and in spite of all compromises by political parties, and the desperate attempts at non-committal by religious bodies, it only grows wider and deeper.