Daniel 6:21
Then said Daniel unto the king, O king, live for ever.
Cross-reference
In Daniel 3:9, the Chaldeans speak the exact same phrase 'O king, live forever' to Nebuchadnezzar — an identical verbal parallel.
In Daniel 5:10, the queen uses the identical greeting to Belshazzar — another instance within the same book.
In Daniel 2:4, the Chaldeans use the same greeting 'O king, live forever' — showing it is a standard Aramaic courtly formula.
In 2 Samuel 16:16, Hushai acclaims Absalom with 'Long live the king' — a similar acclamation but in a context of deceit.
In 1 Kings 1:31, Bathsheba says 'May my lord King David live forever' — another royal blessing in a succession plea.
In Nehemiah 2:3, Nehemiah says 'Let the king live forever' to Artaxerxes — another instance of the same respectful address.