Exodus 33.19
Septuagint

kai
elehsw, on an elew, kai oikteirhsw , 
on an oikteirw

New Testament - Romans 9.15

tw Mwusei gar legei:
elehsw on an elew, kai oikteirhsw 
on an oiktirw

Septuagint

I will have mercy on whom I will have mercy, and will have pity on whom I will have pity

New Testament

For he saith to Moses, I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion

Masoretic Text

and I will be gracious to whom I will be gracious, and will show mercy on whom I will show mercy

Comments:  The NT, LXX and MT agree.