"The Bible was specifically used to justify slavery in the United States: it is quoted in the secession documents of every Dixie state in the Civil War. (Despite the spinmeisters of the modern age, the war was about slavery, not states' rights - every secession document explicitly justifies slavery as the reason for secession.)"
-- Written by James K at https://answers.yahoo.com/question/index?qid=20140427031158AAkffsZ
Leviticus 25:44-46 (New International Version)
44 “‘Your male and female slaves are to come from the nations around you; from them you may buy slaves. 45 You may also buy some of the temporary residents living among you and members of their clans born in your country, and they will become your property. 46 You can bequeath them to your children as inherited property and can make them slaves for life, but you must not rule over your fellow Israelites ruthlessly.