Daniel 1:19 (KJV)

So he consented to them in this matter, and proved them ten days.

And at the end of ten days their countenances appeared fairer and fatter in flesh than all the children which did eat the portion of the king's meat.

Thus Melzar took away the portion of their meat, and the wine that they should drink; and gave them pulse.

As for these four children, God gave them knowledge and skill in all learning and wisdom: and Daniel had understanding in all visions and dreams.

Now at the end of the days that the king had said he should bring them in, then the prince of the eunuchs brought them in before Nebuchadnezzar.

And in all matters of wisdom and understanding, that the king enquired of them, he found them ten times better than all the magicians and astrologers that were in all his realm.

And Daniel continued even unto the first year of king Cyrus.