Isaiah 45.21
Septuagint

ouk estin alloV plhn emou:  dikaioV kai swthr, 
ouk esti parex emou
 

New Testament - Mark 12.32

kai eipen autw o grammateuV:  kalwV didaskale, ep alhqeiaV eipeV oti eiV estin kai 
ouk estin alloV plhn autou

Septuagint

there is not another beside me; a just God and a Saviour; there is none but me
 

New Testament

And the scribe said unto him, Of a truth, Teacher, thou hast well said that he is one; and there is none other but he 

Masoretic Text

and there is no God else besides me, a just God and a Saviour; there is none besides me

Comments:  The NT, the LXX and the MT agree.