John Gill Commentary Daniel 2:25

"Then Arioch brought in Daniel before the king in haste, and said thus unto him, I have found a man of the children of the captivity of Judah, that will make known unto the king the interpretation." — Daniel 2:25 (ASV)

Then Arioch brought in Daniel before the king in haste As knowing how impatient the king was to have his dream, and the interpretation of it, told him; and how pleasing this would be to him, and be a means of ingratiating and establishing him in his affections, as well as for the sake of saving the lives of the wise men:

and said thus unto him, I have found a man of the captives of Judah : as if he had made it his business to inquire after a man capable of answering the king's demands; whereas he sought after Daniel at first, not for this purpose, but to destroy him; and now Daniel made his application to him for introduction to the king, and was not looked after by Arioch; but he here did as courtiers do, make the most of everything to their own advantage, to insinuate themselves into the favour of princes:

it looks by this as if Arioch did not know of Daniel's having been with the king before, and of the promise he had made him; that granting him time, he would satisfy him in the matter requested, which he was now ready to do, as he had told Arioch; and therefore he adds, that will make known unto the king the interpretation ; that is, of his dream.