Leviticus 25:36

נשך ותרבית [TAKE THOU NOT] INTEREST [OF HIM] OR INCREASE — The Rabbis regard them (these two things) as one, but Scripture uses two different words for the same offence in order to prescribe that he who infringes the law, is thereby transgressing two negative commands (Bava Metzia 60b). ויראת מאלהיך BUT BE AFRAID OF THY GOD — Because man’s thoughts are greatly attracted by the idea of taking interest and it comes difficult to him to keep aloof from it, so that he tries to persuade himself that it is a legitimate act (lit., he decides for himself that it is a permissible matter) on account of the fact that his money will otherwise remain unemployed, Scripture was compelled to state: “But be afraid of thy God!" Or take another case: If one pretends that his money belongs to a non-Jew in order to be able to lend it to an Israelite in an ostensibly legitimate way. This is given only to his heart and thoughts to know the real circumstances of the case; Scripture therefore was compelled to state “But be afraid of thy God!” (Bava Metzia 61b).

אַל־תִּקַּ֤ח מֵֽאִתּוֹ֙ נֶ֣שֶׁךְ וְתַרְבִּ֔ית וְיָרֵ֖אתָ מֵֽאֱלֹהֶ֑יךָ וְחֵ֥י אָחִ֖יךָ עִמָּֽךְ׃

Take thou no usury of him, or increase: but fear thy God; that thy brother may live with thee.