Genesis 26.4
Septuagint

kai plhqunw to sperma sou, wV touV asteraV tou ouranou:  kai dwsw tw spermati sou pasan thn ghn tauthn:
kai 
euloghqhsontai 
en tw spermati sou
panta eqnh thV ghV

New Testament - Acts 3.25

umaiV este oi uioi twn profhtwn kai thV diaqhkhV hV dieqeto o qeoV proV touV pateraV umwn legwn proV Abraam: 
kai 
en tw spermati sou 
eneuloghqhsontai
pasai ai patriai thV ghV

Septuagint

And I will multiply thy seed as the stars of heaven; and I will give to thy seed all this land, and all the nations of the earth shall be blessed in thy seed 

New Testament

Ye are the sons of the prophets, and of the covenant which God made with your fathers, saying unto Abraham, And in thy seed shall all the families of the earth be blessed

Masoretic Text

and I will multiply thy seed as the stars of heaven, and will give unto thy seed all these lands; and in thy seed shall all the nations of the earth be blessed

Comments:  The NT, LXX and MT agree.