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.
(ubi sup.) Therefore, He says not, ‘Give all things to him that asks;’ but, Give to every one that asketh; that you should only give what you can give honestly and rightly. For what if one ask for money to employ in oppressing the innocent man? What if he ask your consent to unclean sin? We must give then only what will hurt neither ourselves or others, as far as man can judge; and when you have refused an inadmissible request, that you may not send away empty him that asked, shew the righteousness of your refusal; and such correction of the unlawful petitioner will often be a better gift than the granting his suit.