The king assigned them daily provisions of the royal food and wine. They were to be trained for three years, after which they were to enter the king’s service.
Jewish Publication Society of America Version (JPS1917) - Daniel 1:5 >And the king appointed for them a daily portion of the king's food, and of the wine which he drank, and that they should be nourished three years; that at the end thereof they might stand before the king.