1 Corinthians 7:21-24

21Were you called while a slave? Do not be concerned about it; but if you can be made free, rather use it.

22For he who is called in the Lord while a slave is the Lord’s freedman. Likewise he who is called while free is Christ’s slave.

23You were bought at a price; do not become slaves of men.

24Brethren, let each one remain with God in that state in which he was called.