And the king spake unto Ashpenaz the master of his eunuchs, that he should bring certain of the children of Israel, and of the king's seed, and of the princes;
Ashpenaz the master of his eunuchs - called in Turkey the 'Kislar Aga.' "Eunuchs" mean the king's chamberlains.
Certain ... of the king's seed. Compare the prophecy to Hezekiah, "Behold, the days come, that all that is in thine house, and that which thy fathers have laid up in store unto this day, shall be carried into Babylon: nothing shall be left, saith the Lord. And of thy sons that shall issue from thee, which thou shalt beget, shall they take away; and they shall be eunuchs in the palace of the king of Babylon" (2 Kings 20:17-18).