Daniel 1:4-6

King Nebuchadnezzar wanted only young Israelite men who had nothing wrong with them. They were to be handsome and well educated, capable of learning and understanding, and able to serve in his palace. Ashpenaz was to teach them the language and writings of the Babylonians. 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.