Galatians 4:29

But the Jerusalem that is above is free, which is the mother of us all.

For it is written,

“Rejoice, you barren who don’t bear.

Break out and shout, you who don’t travail.

For the desolate women have more children than her who has a husband.”

Now we, brothers, as Isaac was, are children of promise.

However, what does the Scripture say? “Throw out the servant and her son, for the son of the servant will not inherit with the son of the free woman.”

So then, brothers, we are not children of a servant, but of the free woman.