Jerome
Catena Aurea · Matthäusevangelium 5
Ye have heard that it hath been said, An eye for an eye, and a tooth for a tooth: But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also. And if any man will sue thee at the law, and take away thy coat, let him have thy cloak also. And whosoever shall compel thee to go a mile, go with him twain. Give to him that asketh thee, and from him that would borrow of thee turn not thou away.
Mystically interpreted; When we are smitten on the right cheek, He said not, offer to him thy left, but the other; for the righteous has not a left. That is, if a heretic has smitten us in disputation, and would wound us in a right hand doctrine, let him be met with another testimony from Scripture.