'Youths' in the Bible

youths in whom was no blemish, but well-favored, and skillful in all wisdom, and endowed with knowledge, and understanding science, and such as had ability to stand in the king's palace; and that he should teach them the learning and the language of the Chaldeans.

The prince of the eunuchs said to Daniel, I fear my lord the king, who has appointed your food and your drink: for why should he see your faces worse looking than the youths who are of your own age? so would you endanger my head with the king.

Then let our faces be looked on before you, and the face of the youths who eat of the king's dainties; and as you see, deal with your servants.

At the end of ten days their faces appeared fairer, and they were fatter in flesh, than all the youths who ate of the king's dainties.

Now as for these four youths, God gave them knowledge and skill in all learning and wisdom: and Daniel had understanding in all visions and dreams.