KJV: Children in whom was no blemish, but well favoured, and skilful in all wisdom, and cunning in knowledge, and understanding science, and such as had ability in them to stand in the king's palace, and whom they might teach the learning and the tongue of the Chaldeans.
NASB: youths in whom was no defect, who were good-looking, showing intelligence in every branch of wisdom, endowed with understanding and discerning knowledge, and who had ability for serving in the king's court; and he ordered him to teach them the literature and language of the Chaldeans.