I see no rules governing the treatment of slaves in the Constitution, but even if there were, they would be as irrelevant as the song. The song is not from the Bible, and neither is the Constitution. The song quotes the Bible, but that has nothing whatever to do with my question, which was, "Do you agree with the quote? Would a slave-owning nation be a "Paradise"?
I will take your refusal to answer a perfectly simple question as the answer to the question.
Do you agree with the quote?
Yes
Would a slave-owning nation be a "Paradise"?
No.
I see no rules governing the treatment of slaves in the Constitution,
Article I Section 2. Slaves are to be treated as "three fifths of all other Persons" for the purpose of determining state population for representation in the House of Representatives.