'Personal' in the Bible

The king appointed for them a daily ration from the king’s choice food and from the wine which he drank, and appointed that they should be educated three years, at the end of which they were to enter the king’s personal service.

The king talked with them, and out of them all not one was found like Daniel, Hananiah, Mishael and Azariah; so they entered the king’s personal service.

A stone was brought and placed over the opening to the pit, and the king affixed a seal to it with his personal signet ring and with the signet rings of his officials so that no one would interfere with Daniel's situation.