Augustine of Hippo
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.
(Enchir. 78.) The Lord here forbids his disciples to have lawsuits with others for worldly property. Yet as the Apostle allows such kind of causes to be decided between brethren, and before arbiters who are brethren, but utterly disallows them without the Church, it is manifest what is conceded to infirmity as pardonable.