according to the tenor of the law which they shall teach thee, and according to the judgment which they shall tell thee, thou shalt do; thou shalt not turn aside from the sentence which they shall show thee, to the right hand, nor to the left.

Acting in agreement with their teaching and the decision they give: not turning to one side or the other from the word they have given you.

Κατα την αποφασιν του νομου την οποιαν σε αναγγειλωσι, και κατα την κρισιν την οποιαν σε ειπωσι, θελεις καμει· δεν θελεις εκκλινει απο του λογου τον οποιον σε αναγγειλωσι, δεξια η αριστερα.

According to the sentence of the law which they shall teach thee, and according to the judgment which they shall tell thee, thou shalt do: thou shalt not decline from the sentence which they shall shew thee, to the right hand, nor to the left.