John Chrysostom
Catena Aurea · Matthäusevangelium 23
Then spake Jesus to the multitude, and to his disciples, Saying, The Scribes and the Pharisees sit in Moses’ seat: All therefore whatsoever they bid you observe, that observe and do; but do not ye after their works: for they say, and do not. For they bind heavy burdens and grievous to be borne, and lay them on men’s shoulders; but they themselves will not move them with one of their fingers.
(Hom. lxxii.) But that none should say, For this cause am I slack to practise, because my instructor is evil, He removes every such plea, saying, All therefore whatsoever they say unto you, that observe and do, for they speak not their own, but God’s, which things He taught through Moses in the Law. And look with how great honour He speaks of Moses, shewing again what harmony there is with the Old Testament.