Daniel 1:4-15

young men without blemish and handsome in appearance, skillful in all wisdom, endowed with intelligence and discernment, and quick to understand, competent to stand [in the presence of the king] and able to serve in the king’s palace. He also ordered Ashpenaz to teach them the literature and language of the Chaldeans. The king assigned a daily ration for them from his finest food and from the wine which he drank. They were to be educated and nourished this way for three years so that at the end of that time they were [prepared] to enter the king’s service. Among them from the sons of Judah were: Daniel, Hananiah, Mishael, and Azariah. The commander of the officials gave them [Babylonian] names: Daniel he named Belteshazzar, Hananiah he named Shadrach, Mishael he named Meshach, and Azariah he named Abed-nego. But Daniel made up his mind that he would not defile (taint, dishonor) himself with the king’s finest food or with the wine which the king drank; so he asked the commander of the officials that he might [be excused so that he would] not defile himself. [Num 6:1-4; 1 Cor 10:21] Now God granted Daniel favor and compassion in the sight of the commander of the officials, and the commander of the officials said to Daniel, “I am afraid of my lord the king, who has prearranged your food and your drink; for why should he see your faces looking more haggard than the young men who are your own age? Then you would make me forfeit my head to the king.” But Daniel said to the overseer whom the commander of the officials had appointed over Daniel, Hananiah, Mishael, and Azariah, “Please, test your servants for ten days, and let us be given some vegetables to eat and water to drink. Then let our appearance and the appearance of the young men who eat the king’s finest food be observed and compared by you, and deal with your servants in accordance with what you see.” So the man listened to them in this matter and tested them for ten days. At the end of ten days it seemed that they were looking better and healthier than all the young men who ate the king’s finest food.