ISB ~ Ephesians 6 v5

Slaves, be obedient:Slavery was widely accepted in the ancient world and was often cruel and inhumane. For this reason, Paul stresses the equal dignity of slaves and their masters before God (6:8) and seeks to improve the relationship between them (6:9). Slaves are summoned to serve their masters willingly and honestly, while masters are called to respect their servants and refrain from harsh treatment. Although Paul does not challenge the institution of slavery directly, the principles of his gospel work indirectly against it (Gal 3:28; Philem 16). See note on 1 Cor 7:21.