This is more or less a history-based question than a Christianity-based question, but it is tied to Christian history.
I remember reading from a history textbook that there were several reasons to keep slavery - financial, economic, social, and religious. Now, it was an American history textbook, not a Christian history textbook, which led me to speculate about the specific biblical verses that were used to justify slavery.
What biblical verses did people use to justify slavery?
Is this question too broad, or has it been answered before that it needs not to be on here? Do I need to scope to a specific denomination in the 19th century South that had certain congregants who used the Bible to argue in favor of slavery or some denominations in the North against slavery?