O king, live for ever— לעלמין lealmin, in saecula, or "long live the king;" an usual mode of addressing the monarch. When he in his turn addressed the people, it was, as we have seen, "Your peace be multiplied;" see Daniel 6:25. And when the people saluted one another, it was according to the mode now practised, as Shaw tells us, among the Bedouin Arabs, "Peace be unto you." Mr. Bruce intimates, that when individuals or clans of suspected persons meet each other, if the one party pronounces this Salam Alicum, and it is returned by the other Alicum Salam, it is a sure indication that no evil is intended on either part.
Related Commentaries of Daniel 6:21
Daniel 6:21
21 Then said Daniel unto the king, O king, live for ever.