Daniel 1:5

1:5 So the king assigned them a daily ration from his royal delicacies and from the wine he himself drank. They were to be trained for the next three years. At the end of that time they were to enter the king’s service.

Daniel 1:18

1:18 When the time appointed by the king arrived, the overseer of the court officials brought them into Nebuchadnezzar’s presence.