Genesis 18.14
Septuagint

mh adunathsei para tw qew rhma; eiV 
ton kairon touton
anastreyw proV se eiV wraV, 
kai estai th Sarra uioV

New Testament - Romans 9.9

epaggeliaV gar o logoV outoV:  kata
ton kairon touton
eleusomai
kai estai th Sarra uioV

Septuagint

Shall anything be impossible to the Lord?  At this time I will return to thee seasonably, and Sarah shall have a son

New Testament

For this is the word of promise, According to this season will I come, and Sarah shall have a son
 

Masoretic Text

Is anything too hard for Jehovah?  At the set time I will return unto thee, when the season cometh round, and Sarah shall have a son

Comments:  The NT, LXX and MT agree.