Daniel 1:12-14

12He said, ‘Please sir, watch us for ten days. Give us only vegetables to eat and water to drink.

13After ten days, see what our faces and our bodies look like. Also see what the other young men who eat the king's food look like. When you look at them and you look at us, you can decide what to do with us.’

14The guard agreed to what they said. He watched them for ten days.