"Please test your servants for ten days. Let us be given vegetables to eat and water to drink.
You can then compare our appearance with the appearance of the young men who eat the royal rations, and deal with your servants according to what you observe."
So he agreed to this proposal and tested them for ten days.
At the end of ten days it was observed that they appeared better and fatter than all the young men who had been eating the royal rations.
So the guard continued to withdraw their royal rations and the wine they were to drink, and gave them vegetables.
To these four young men God gave knowledge and skill in every aspect of literature and wisdom; Daniel also had insight into all visions and dreams.
At the end of the time that the king had set for them to be brought in, the palace master brought them into the presence of Nebuchadnezzar,
and the king spoke with them. And among them all, no one was found to compare with Daniel, Hananiah, Mishael, and Azariah; therefore they were stationed in the king's court.
In every matter of wisdom and understanding concerning which the king inquired of them, he found them ten times better than all the magicians and enchanters in his whole kingdom.
And Daniel continued there until the first year of King Cyrus.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (New Revised Standard Bible Version Online)