Isaiah 40.13
Septuagint

tiV egnw noun kuriou; 
kai tiV 
autou sumbouloV egeneto, 
oV sumbiba auton;
 
 
 

 

New Testament - Romans 11.34

tiV gar egnw noun kuriou;
h tiV 
sumbouloV autou egeneto;

1 Corinthians 2.16

tiV gar egnw noun kuriou,
oV sumbibasei auton;
hmeiV de noun Cristou ecomen

Septuagint

Who has known the mind of the Lord?  or who has been his counsellor, to instruct him
 

New Testament

Romans 11.34:  For who hath known the mind of the Lord?  or who hath been his counsellor?

1 Corinthians 2.16For who hath known the mind of the Lord, that he should instruct him?  But we have the mind of Christ 

Masoretic Text

Who hath directed the Spirit of Jehovah, or being his counsellor hath taught him?

Comments:  The MT emphasizes the Lordís Spirit, which is decidedly different from the NT and the LXX, where the mind of the Lord is the object of inquiry.