This series of teachings is called a household code. Paul instructs wives (3:18), husbands (3:19), children (3:20), fathers (3:21), slaves (3:22–25), and masters (4:1). Similar codes are found in Greco-Roman writings and other parts of the New Testament (see Ephesians 5:22–6:9; 1 Peter 2:18–3:7).