Ecclesiastes 8:5 directly expands on keeping commands, promising safety and wisdom — a clear thematic parallel within the same passage.

1 Kings 2:43 shows the consequence of breaking an oath to the king and the LORD, providing a negative example of the principle in Ecclesiastes.

Proverbs 24:21 similarly commands fearing both God and the king, reinforcing the dual allegiance behind keeping the king's command.

Ezekiel 17:13-20 details the oath-breaking of King Zedekiah to Babylon's king, illustrating the seriousness of violating a king's command sworn before God.

Romans 13:1-4 grounds submission to authorities in God's ordinance, echoing Ecclesiastes' reason 'because of God's oath'.

Romans 13:5 adds conscience as motive for submission, deepening the 'because of God's oath' rationale in Ecclesiastes.

Titus 3:1 instructs believers to be submissive to rulers, a direct New Testament parallel to the command in Ecclesiastes.

1 Peter 2:13-17 expands on submitting for the Lord's sake, aligning with Ecclesiastes' motive of honoring God through obedience to the king.

Romans 13:4 portrays rulers as God's servants for good, reinforcing the reason to obey them — a strong NT parallel to submission to authority.

1 Peter 2:17 commands honoring the emperor alongside fearing God — directly parallels the oath-based loyalty to the king.

1 Chronicles 29:24 records leaders pledging allegiance to King Solomon, a positive example of keeping the king's command as urged in Ecclesiastes.