What is the meaning of Galatians 4:27?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

For it is written: “Rejoice, O barren woman, who bears no children; break forth and cry aloud, you who have never travailed; because more are the children of the desolate woman than of her who has a husband.”

Berean Standard Bible (BSB)

For it is written, “Rejoice, you barren who don’t bear. Break forth and shout, you that don’t travail. For more are the children of the desolate than of her who has a husband.”

World English Bible (WEB)

For{G1063} it is written{G1125}{(G5769)}, Rejoice{G2165}{(G5682)}, thou barren{G4723} that bearest{G5088}{(G5723)} not{G3756}; break forth{G4486}{(G5657)} and{G2532} cry{G994}{(G5657)}, thou that travailest{G5605}{(G5723)} not{G3756}: for{G3754} the desolate{G2048} hath many more{G4183} children{G5043} than{G3123}{G2228} she which hath{G2192}{(G5723)} an husband{G435}.

Strong's King James

(27) For it's written,"REJOICE BARREN ONE WHO DOESN'T GIVE BIRTH, BURST OUT AND SHOUT, YOU, WHO ISN'T IN LABOUR, FOR MORE NUMEROUS ARE THE CHILDREN OF THE WILDERNESS, THAN THE ONE WHO HAS A HUSBAND."

The F.O.G*

[27] As Isaiah wrote: "Rejoice, barren woman who hasn't given birth! Break forth in joyful shouting, you who have never been in labor! For the desolate woman will have more children than she who has a husband!"

The F.O.G Paraphrase

for it hath been written, ‘Rejoice, O barren, who art not bearing; break forth and cry, thou who art not travailing, because many are the children of the desolate—more than of her having the husband.’

Young's Literal Translation