2 Kings 20:18
And of your sons that shall issue from you, which you shall beget, shall they take away; and they shall be eunuchs in the palace of the king of Babylon.
Torrey's Topical Textbook—AKJV

Daniel 1:3,4
And the king spoke to 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;
Torrey's Topical Textbook—AKJV