Here’s an interesting compilation of 47 biblical verses referencing slavery.
http://www.openbible.info/topics/slavery
The best way, IMO, to think of the practice in the ancient world, is that it never crossed anybody’s mind it could be abolished. Anymore than anybody in the modern world has suggested getting rid of gravity.
The notion that slavery can and should be denounced, opposed and eventually abolished evolved directly out of Christian doctrine. No other society in the history of the world has come up with the remarkably radical idea that “all men are created equal.”
Today we take the idea so for granted that Christianity and the Bible get no credit for it, which is a shame.
Thanks, we could begin with this one:
Exodus 21:16 ESV / 51:
Both literally and metaphorically, the Bible is all about exchanging our slavery to lesser human masters & vices, for devotion to God's law, Christ's love and to our brothers and sisters in Christ.