John Gill Commentary Daniel 6:13

"Then answered they and said before the king, That Daniel, who is of the children of the captivity of Judah, regardeth not thee, O king, nor the interdict that thou hast signed, but maketh his petition three times a day." — Daniel 6:13 (ASV)

Then answered they, and spoke before the king. Having obtained what they desired, a ratification of the decree, they open the whole affair to him they came about: that Daniel, which is of the children of the captivity of Judah, regards not you, O king. They call him "that Daniel"; by way of contempt; and, to make him the more despicable, represent him not only as a foreigner, but a captive, and therefore ought to have been humble and obedient, as Jacchiades observes; and a Jewish captive too, of all people the most odious; and, though he had been raised from a low estate to great honour and dignity, yet such was his ingratitude, that he made no account of the king, nor of his orders, but despised him.

Nor the decree that you have signed; the decree concerning making any petition to God or man for a month, which was signed with the king's own hand, and was firm and stable; and of which Daniel could not be ignorant, and therefore wilfully, and in a contemptuous manner, acted contrary to it.

But makes his petition three times a day; to whom they do not say whether to God or man; but in this general way accuse him which they thought was best and safest; they feared, had they mentioned his God, something might have been said in his favour to excuse him; and to aggravate the matter, they observe the frequency of his doing it, three times; so that it was not a single fact he is charged with, but what he had repeated again and again.