Daniel 1:19-21

19 The king talked to them. He found that none of the young men were as good as Daniel, Hananiah, Mishael and Azariah. So those four young men became the king’s servants.

20 Every time the king asked them about something important, they showed much wisdom and understanding. He found they were ten times better than all the fortune-tellers and magicians in his kingdom.

21 So Daniel continued to be the king’s servant until the first year Cyrus was king.