John Gill Commentary Daniel 6:21

"Then said Daniel unto the king, O king, live for ever." — Daniel 6:21 (ASV)

Then said Daniel unto the king Whose voice he knew, though the tone of it was so much altered: O king, live for ever; he does not reproach him for delivering him into the hands of his enemies, and suffering him to be cast into that place, which he might have prevented, had he had more resolution; he knew it was done with reluctance, though with weakness; which he does not upbraid him with, but freely forgives him, and wishes him health, long life, and prosperity.