Bava Metzia 5:11-6:1

וְאֵלּוּ עוֹבְרִין בְּלֹא תַעֲשֶׂה. הַמַּלְוֶה, וְהַלֹּוֶה, וְהֶעָרֵב, וְהָעֵדִים. וַחֲכָמִים אוֹמְרִים, אַף הַסּוֹפֵר. עוֹבְרִים מִשּׁוּם לֹא תִתֵּן (ויקרא כה), וּמִשּׁוּם בַּל תִּקַּח מֵאִתּוֹ (שם), וּמִשּׁוּם לֹא תִהְיֶה לוֹ כְּנשֶׁה (שמות כב), וּמִשּׁוּם לֹא תְשִׂימוּן עָלָיו נֶשֶׁךְ (שם), וּמִשּׁוּם וְלִפְנֵי עִוֵּר לֹא תִתֵּן מִכְשֹׁל וְיָרֵאתָ מֵּאֱלֹהֶיךָ אֲנִי ה’ (ויקרא יט): And these people violate a prohibition of interest: The lender, and the borrower, and the guarantor, and the witnesses. And the Rabbis say: Also the scribe who writes the promissory note violates this prohibition. These parties to the transaction violate different prohibtions. Some are in violation of: “You shall not give him your money with interest” (Leviticus 25:37), and of: “Do not take from him interest or increase” (Leviticus 25:36), and of: “Do not be to him as a creditor” (Exodus 22:24), and of “Do not place interest upon him” (Exodus 22:24), and of: “And you shall not place a stumbling block before the blind, and you shall fear your God; I am the Lord” (Leviticus 19:14).Mishnah Bava Metzia 5:11

 

הַשּׂוֹכֵר אֶת הָאֻמָּנִין, וְהִטְעוּ זֶה אֶת זֶה, אֵין לָהֶם זֶה עַל זֶה אֶלָּא תַרְעֹמֶת. שָׂכַר אֶת הַחַמָּר וְאֶת הַקַּדָּר לְהָבִיא פִרְיָפְרִין וַחֲלִילִים לַכַּלָּה אוֹ לַמֵּת, וּפוֹעֲלִין לְהַעֲלוֹת פִּשְׁתָּנוֹ מִן הַמִּשְׁרָה, וְכָל דָּבָר שֶׁאָבֵד, וְחָזְרוּ בָהֶן, מְקוֹם שֶׁאֵין שָׁם אָדָם, שׂוֹכֵר עֲלֵיהֶן אוֹ מַטְעָן: With regard to one who hires artisans or laborers, and they deceived one another, they have nothing but a grievance against one another, and they have no financial claim against the deceptive party. If one hired a donkey driver or a potter to bring posts [piryafarin] for a canopy or flutes to play in honor of a bride or the dead, or if he hired laborers to bring up his flax from the retting tub, i.e., the container of water in which flax is placed in the first stage of the manufacture of linen, and likewise any matter that involves financial loss if not performed on time and the laborers reneged, if this occurred in a place where there is no other person to perform the task, he may hire replacements for a large fee at the expense of the first workers, or deceive them to get them to return to work.Mishnah Bava Metzia 6:1