1 Corinthians 7:20-23

Each man must remain in that condition in which he was called. Were you called while a slave? Do not worry about it; but if you are able also to become free, rather do that. For he who was called in the Lord while a slave, is the Lord’s freedman; likewise he who was called while free, is Christ’s slave. You were bought with a price; do not become slaves of men.