(Devarim 23:20) "You shall not give interest to your brother": This tells me only of the borrower (that he should not give interest.) Whence do I derive (the same for) the lender (that he should not take interest)? From (Vayikra 25:36) "You shall not take from him interest."
(Vayikra 25:37: "Your money you shall not give him on interest, and on increase you shall not give your food."): From "your money," I derive: your money, but not that of others (i.e., gentiles); "your food," but not that of others. — But perhaps (the inference should be) "your money," but not that of ma'aser (the tithe); "your food," but not that of beasts! — (No, for "interest of money" (Devarim, Ibid.) includes money of ma'aser (as interdicted); "interest of food" includes food of beasts. This tells me only of interest of money and interest of food (as interdicted). Whence do I derive the same for any kind of interest? From (Ibid.) "interest of anything that can be (construed as) interest."
R. Shimon says: Whence is it derived that he (the lender) should not tell him (the borrower): Go and greet that man, or: Find out if that man has come from his place? From "interest of any thing ("devar," like "dibbur" [speech]).
(דברים כג כ) לֹא תַשִּׁיךְ לְאָחִיךָ, זֶה לֹוֶה, מַלְוֶה מִנַּיִן? תַּלְמוּד לוֹמַר (ויקרא כה לו): ״אַל תִּקַּח מֵאִתּוֹ נֶשֶׁךְ וְתַרְבִּית״.
(Devarim 23:20) "You shall not give interest to your brother": This tells me only of the borrower (that he should not give interest.) Whence do I derive (the same for) the lender (that he should not take interest)? From (Vayikra 25:36) "You shall not take from him interest."
מִכְּלָל שֶׁנֶּאֱמַר ״כַּסְפְּךָ״ וְלֹא כֶּסֶף אֲחֵרִים, ״אָכְלֶךָ״ וְלֹא אֹכֶל אֲחֵרִים, אוֹ ״כַּסְפְּךָ״ וְלֹא כֶּסֶף מַעֲשֵׂר, ״אָכְלֶךָ״ וְלֹא אֹכֶל בְּהֵמָה? כְּשֶׁהוּא אוֹמֵר נֶשֶׁךְ כֶּסֶף לְרַבּוֹת כֶּסֶף מַעֲשֵׂר, נֶשֶׁךְ אֹכֶל לְרַבּוֹת אָכְלֵי בְהֵמָה. אֵין לִי אֶלָּא נֶשֶׁךְ כֶּסֶף נֶשֶׁךְ אֹכֶל, מִנַּיִן לְרַבּוֹת כָּל דָּבָר? תַּלְמוּד לוֹמַר: נֶשֶׁךְ כָּל דָּבָר אֲשֶׁר יִשָּׁךְ.
(Vayikra 25:37: "Your money you shall not give him on interest, and on increase you shall not give your food."): From "your money," I derive: your money, but not that of others (i.e., gentiles); "your food," but not that of others. — But perhaps (the inference should be) "your money," but not that of ma'aser (the tithe); "your food," but not that of beasts! — (No, for "interest of money" (Devarim, Ibid.) includes money of ma'aser (as interdicted); "interest of food" includes food of beasts. This tells me only of interest of money and interest of food (as interdicted). Whence do I derive the same for any kind of interest? From (Ibid.) "interest of anything that can be (construed as) interest."
רַבִּי שִׁמְעוֹן אוֹמֵר: מִנַּיִן שֶׁלֹּא יֹאמַר לוֹ: צֵא וּשְׁאַל שְׁלוֹם פְּלוֹנִי, אוֹ דַּע אִם בָּא אִישׁ פְּלוֹנִי מִמָּקוֹם פְּלוֹנִי? תַּלְמוּד לוֹמַר: נֶשֶׁךְ כָּל דָּבָר אֲשֶׁר יִשָּׁךְ.
R. Shimon says: Whence is it derived that he (the lender) should not tell him (the borrower): Go and greet that man, or: Find out if that man has come from his place? From "interest of any thing ("devar," like "dibbur" [speech]).