This Bible contradiction is from the EvilBible.com.
Slavery and oppression ordained
Genesis 9:25 View context
And he said, Cursed [be] Canaan; a servant of servants shall he be unto his brethren.
Leviticus 25:45-46 View context
Moreover of the children of the strangers that do sojourn among you, of them shall ye buy, and of their families that [are] with you, which they begat in your land: and they shall be your possession.
And ye shall take them as an inheritance for your children after you, to inherit [them for] a possession; they shall be your bondmen for ever: but over your brethren the children of Israel, ye shall not rule one over another with rigour.
Joel 3:8 View context
And I will sell your sons and your daughters into the hand of the children of Judah, and they shall sell them to the Sabeans, to a people far off: for the LORD hath spoken [it].
Slavery and oppression forbidden
Isaiah 58:6 View context
[Is] not this the fast that I have chosen? to loose the bands of wickedness, to undo the heavy burdens, and to let the oppressed go free, and that ye break every yoke?
Exodus 22:21 View context
Thou shalt neither vex a stranger, nor oppress him: for ye were strangers in the land of Egypt.
Exodus 21:16 View context
And he that stealeth a man, and selleth him, or if he be found in his hand, he shall surely be put to death.
Matthew 23:10 View context
Neither be ye called masters: for one is your Master, [even] Christ.