Daniel 1:6-7, 11, 19

Now from among those of the sons of Judah were Daniel, Hananiah, Mishael, and Azariah. To them the chief of the eunuchs gave names: he gave Daniel the name Belteshazzar; to Hananiah, Shadrach; to Mishael, Meshach; and to Azariah, Abed-Nego.

So Daniel said to the steward whom the chief of the eunuchs had set over Daniel, Hananiah, Mishael, and Azariah

Then the king interviewed them, and among them all none was found like Daniel, Hananiah, Mishael, and Azariah; therefore they served before the king.