The article said Jesus taught it! Where?
What the Apostles and their successors taught came from Jesus.
Jesus taught by example, preaching and instructing the Apostles.
in His Sermon on the Mount, he condemns as sinful many acts which were judged honest and righteous by the doctors and teachers of the Old Law. He denounces in a special manner hypocrisy and scandal, infidelity and the sin against the Holy Ghost. In particular he teaches that sins come from the heart (Matt., xv, 19-20).