Daniel 1:12-16

“Test us, your servants, for ten days. Give us only seeds to eat and water to drink. Then afterward, compare our appearance with those of the young men who eat the king’s food. Then you can decide what to do with us.” So the overseer agreed to do what they requested and tested them for ten days. And when the ten days were completed, they looked healthier and had even gained weight. The four Hebrew young men were in better physical condition compared to any of the others who had eaten their food from the royal table. So the guard replaced their diet of royal food and wine with vegetables and water.