Colossians 3:25
Masters, treat your slaves justly and fairly, knowing that you also have a Master in heaven — masters are commanded to treat slaves 'justly and fairly' (dikaios, isotēs). They answer to a 'Master in heaven' (kyriēs en ouranois): God oversees their conduct. Slavery's brutality is checked: masters are accountable. Yet abolition is not demanded, only ethical mitigation.