Exodus 22:24

אם כסף תלוה את עמי IF THOU LEND MONEY TO ANY OF MY PEOPLE — R. Yishmael said: wherever אם occurs in Scripture it is used of an act the performance of which is optional, except in three instances, of which this is one (Mekhilta; cf. Rashi on Exodus 20:22 - the translation therefore is: “When thou lendeth etc.”). את עמי TO ANY OF MY PEOPLE — If thou hast to choose between lending money to My people and a heathen, My people come first; if between a poor man and one who is better off, the poor man comes first; if between thine own poor (poor relatives) and other poor of thy city, thine own poor come first; if between the poor of thine own city and the poor of another city, the poor of thine own city come first (Mekhilta; Bava Metzia 71a). And this is how the above explanation is implied in the text: “If thou lend money” — את עמי “lend it to My people”, and not to a heathen; and to which one of My people? את העני, to the poor; and to which poor? עמך to him that is with thee (i. e. who is with thee in relationship and is with thee in thy city). [Another explanation of את עמי is: Thou shalt not treat him disrespectfully when lending him money, for he is עמי — though in need he is still “My people”! את העני עמך Look at thyself as though thou art the poor man (Midrash Tanchuma 6:15)]. לא תהיה לו כנשה THOU SHALT NOT BE UNTO HIM AS AN EXACTOR — you shall not demand the debt of him forcibly. The comparative כ of כנשה suggests thou shalt not be like a נשה: if you know that he has no money do not appear in your attitude towards him as though you had lent him, but as though you had not lent him — it means as much as, do not humble him. נשך is what is called in Rabbinical Hebrew רבית (from רבה to increase). It is called נשך “biting”, because it resembles the bite of a snake: it bites, inflicting a small wound in a person’s foot which he does not feel at first, but all at once it swells and distends the whole body up to the top of his head. So it is with interest: at first one does not feel the drain it makes on him and it remains unnoticed until the interest mounts up and suddenly makes the person lose a big fortune (Exodus Rabbah 31:6).

אִם־כֶּ֣סֶף ׀ תַּלְוֶ֣ה אֶת־עַמִּ֗י אֶת־הֶֽעָנִי֙ עִמָּ֔ךְ לֹא־תִהְיֶ֥ה ל֖וֹ כְּנֹשֶׁ֑ה לֹֽא־תְשִׂימ֥וּן עָלָ֖יו נֶֽשֶׁךְ׃

If thou lend money to any of my people that is poor by thee, thou shalt not be to him as a creditor, neither shall you lay upon him interest.