וּמִבָּנֶ֜יךָ אֲשֶׁ֨ר יֵצְא֧וּ מִמְּךָ֛ אֲשֶׁ֥ר תּוֹלִ֖יד יקח [יִקָּ֑חוּ] וְהָיוּ֙ סָֽרִיסִ֔ים בְּהֵיכַ֖ל מֶ֥לֶךְ בָּבֶֽל׃
從你所出、你所生的兒子中，也必有人被帶走，在巴比倫王的宮中作官員。
Mesillat Yesharim
Hizkiyahu, because he showed the treasure house to the ministers of the king of Babylonia, it was decreed that his sons be castrated servants (eunuchs) in the palace of the King of Babylonia (Kings II 20:13).