Galatians 4:27
For it is written, Rejoice, thou barren that bearest not; break forth and cry, thou that travailest not: for the desolate hath many more children than she which hath an husband.
Cross-reference
Isaiah 54:1
Citation
Isaiah 54:1 is the direct prophecy Paul quotes — the barren woman's joy over more children than the married woman.
Genesis 21:6
Typology
In Genesis 21:6, Sarah laughs for joy at Isaac's birth — the OT fulfillment of God's promise to the barren, which Paul applies to the new covenant.
1 Samuel 2:5
Parallel
1 Samuel 2:5 similarly celebrates God reversing barrenness — the barren bears seven, while the many-children woman pines away.
Isaiah 49:21
Parallel
Isaiah 49:21 also depicts a barren woman amazed at her many children — same prophetic theme of restoration.
Psalm 113:9
Related theme
Psalm 113:9 praises God who gives the barren woman a home and joyful children — same reversal theme as Paul's quote.