Daniel 1:5-8

The king gave the young men a certain amount of food and wine every day, just like the food he ate. The young men were to be trained for three years, and then they would become servants of the king of Babylon. Among those young men were Daniel, Hananiah, Mishael, and Azariah from the people of Judah. Ashpenaz, the chief officer, gave them Babylonian names. Daniel’s new name was Belteshazzar, Hananiah’s was Shadrach, Mishael’s was Meshach, and Azariah’s was Abednego. Daniel decided not to eat the king’s food or drink his wine because that would make him unclean. So he asked Ashpenaz for permission not to make himself unclean in this way.