Isaiah 54.1
Septuagint

eufranqhti steira h ou tiktousa, 
rhxon kai bohson h ouk wdinousa, 
oti polla ta tekna thV erhmou, 
mallon h thV ecoushV ton andra

New Testament - Galatians 4.27

eufranqhti steira h ou tiktousa, 
rhxon kai bohson, h ouk wdinousa, 
oti polla ta tekna thV erhmou, 
mallon h thV ecoushV ton andra

Septuagint

Rejoice, thou barren that bearest not; break forth and cry, thou that dost not travail:  for more are the children of the desolate than of her that has a husband

New Testament

Rejoice, thou barren that bearest not; Break forth and cry, thou that travailest not:  For more are the children of the desolate than of her that hath the husband

Masoretic Text

Sing, O barren, thou that didst not bear; break forth into singing, and cry aloud, thou that didst not travail with child:  for more are the children of the desolate than the children of the married wife

Comments:  The NT and the LXX agree exactly.  The MT varies in a few points.