Handmaids tale watchers?

What is that quote Serena says to offred/June at the end of the last episode???

Was it in the Bible?

OKAY JUST KIDDING I FOUND IT

But thus saith the Lord, Even the captives of the mighty shall be taken away, and the prey of the terrible shall be delivered: for I will contend with him that contendeth with thee, and I will save thy children.

I don’t understand why Serena said this to June. It doesn’t make sense to me