Daniel 1:5-8

The king assigned them a daily portion of the food that the king ate, and of the wine that he drank. They were to be educated for three years, and at the end of that time they were to stand before the king. Among these were Daniel, Hananiah, Mishael, and Azariah of the tribe of Judah. And the chief of the eunuchs gave them names: Daniel he called Belteshazzar, Hananiah he called Shadrach, Mishael he called Meshach, and Azariah he called Abednego. But Daniel resolved that he would not defile himself with the king’s food, or with the wine that he drank. Therefore he asked the chief of the eunuchs to allow him not to defile himself.