Isaiah 39:7

7 aAnd some of your own sons, who will come from you, whom you will father, shall be taken away, and they shall be eunuchs in the palace of the king of Babylon.”

Isaiah 56:3-4

3 Let not bthe foreigner who has joined himself to the Lord say,
“The Lord will surely separate me from his people”;
and let not the eunuch say,
Behold, I am ca dry tree.”
4For thus says the Lord:
“To the eunuchs dwho keep my Sabbaths,
who choose the things that please me
and hold fast my covenant,
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