Ephesians 6:5-8 expands on the same household code for slaves — obedience and sincerity parallel Titus 2:9's instruction.

Colossians 3:22-25 parallels Titus 2:9's command to slaves — obedience in everything, with sincerity, as to the Lord.

1 Timothy 6:1 gives a similar instruction for slaves to respect masters, with the same aim of avoiding slander — closely related to Titus 2:9.

1 Peter 2:18-25 expands on slave submission, even to harsh masters, pointing to Christ's suffering as example.