Daniel 1:15-17 (New International Version)

 ¹⁵ At the end of the ten days they looked healthier and better nourished than any of the young men who ate the royal food. ¹⁶ So the guard took away their choice food and the wine they were to drink and gave them vegetables instead.

 ¹⁷ To these four young men God gave knowledge and understanding of all kinds of literature and learning. And Daniel could understand visions and dreams of all kinds.