Daniel 1:6-8

6 And among these there were, of the children of Judah, Daniel, Hananiah, Mishael, and Azariah.

7 And the captain of the unsexed servants gave them names; to Daniel he gave the name of Belteshazzar, to Hananiah the name of Shadrach, to Mishael the name of Meshach, and to Azariah the name of Abed-nego.

8 And Daniel had come to the decision that he would not make himself unclean with the king's food or wine; so he made a request to the captain of the unsexed servants that he might not make himself unclean.