'Trained' in the Bible

Young men who were strong and healthy, good-looking, and trained in all wisdom, having a good education and much knowledge, and able to take positions in the king's house; and to have them trained in the writing and language of the Chaldaeans.

The king assigned them daily provisions from the royal food and from the wine that he drank. They were to be trained for three years, and at the end of that time they were to serve in the king’s court.