Titus 1:9 describes the elder's role of holding sound doctrine to exhort and refute — the same foundation for speaking sound doctrine commanded here.

1 Timothy 6:3 warns against those who disagree with sound words — the same standard of sound doctrine Titus is commanded to speak.

2 Timothy 1:13 urges holding the pattern of sound words — the same standard of sound doctrine Titus is commanded to speak.

1 Timothy 4:6 describes being trained in good doctrine and teaching it — directly parallel to Titus's charge.

Romans 2:21 exposes hypocrisy in teachers — a warning contrasting with the call to teach sound doctrine.

1 Timothy 6:2 similarly urges teaching sound doctrine — a consistent pastoral instruction.