6מִי שֶׁהָיָה נוֹשֶׁה בַּחֲבֵרוֹ מָעוֹת וְאָמַר לוֹ תֵּן לִי מְעוֹתַי שֶׁאֲנִי רוֹצֶה לִקַּח בָּהֶן חִטִּים. אָמַר לוֹ צֵא וַעֲשֵׂה אוֹתָן עָלַי כְּשַׁעַר שֶׁל עַכְשָׁו וְיִהְיֶה לְךָ אֶצְלִי חִטִּים בְּהַלְוָאָה. אִם יֵשׁ לוֹ חִטִּים כְּשִׁעוּר מְעוֹתָיו מֻתָּר וְאִם אֵין [לוֹ] אוֹתוֹ הַמִּין הֲרֵי זֶה אָסוּר. שֶׁלֹּא אָמְרוּ חֲכָמִים שֶׁמֻּתָּר לִפְסֹק עַל שַׁעַר שֶׁבַּשּׁוּק אַף עַל פִּי שֶׁאֵין לוֹ כְּלוּם מֵאוֹתוֹ הַמִּין אֶלָּא בְּנוֹתֵן מְעוֹתָיו לִקְנוֹת בָּהֶן פֵּרוֹת. אֲבָל הָרוֹצֶה לְהַעֲמִיד הַלְוָאָתוֹ עַל גַּב הַפֵּרוֹת אָסוּר עַד שֶׁיִּהְיוּ לוֹ פֵּרוֹת. הָיָה לַלּוֶֹה חִטִּים וְעָשָׂה הַלְוָאָתוֹ עָלָיו חִטִּים וּבָא אַחַר זְמַן וְאָמַר לוֹ תֵּן לִי חִטִּים שֶׁאֲנִי רוֹצֶה לְמָכְרָן וְלִקַּח בִּדְמֵיהֶן יַיִן. אָמַר לוֹ צֵא וַעֲשֵׂה אוֹתָן עָלַי יַיִן כַּשַּׁעַר שֶׁבַּשּׁוּק עַתָּה. אִם יֵשׁ לוֹ יַיִן הֲרֵי זֶה מֻתָּר וְנַעֲשֵׂית הַלְוָאָתוֹ אֶצְלוֹ יַיִן וְאִם אֵין לוֹ יַיִן אָסוּר. הֲרֵי שֶׁלֹּא הָיָה לוֹ וְעָבַר וְהֶחְזִיר הַהַלְוָאָה פֵּרוֹת אַף עַל פִּי שֶׁקָּנָה פֵּרוֹת אַחַר כָּךְ אֵינוֹ חַיָּב לִתֵּן לוֹ פֵּרוֹת אֶלָּא נוֹתֵן לוֹ מָעוֹת שֶׁהִלְוָהוּ:
A loan may not be repaid with a loan of produce. To explain: A person owed a colleague money. The lender told the borrower: "Give me my money, because I want to purchase wheat with it." The borrower responded: "Go out and establish the money I owe you as a debt of wheat according to the present market price." If the borrower possesses an equivalent quantity of wheat, this is permitted. If, however, he does not have that type of produce, this is forbidden. For our Sages said that it is permitted to place an order based on a commodity's market price, even though the seller does not possess any of that commodity, only when the purchaser is paying money for the acquisition. It is, however, forbidden to transfer a debt of money into a debt of produce unless the borrower possesses the produce. The concept can be extended when, in the above situation, the borrower did possess wheat and the debt was transferred into a debt of wheat. Similar rules apply if afterwards the lender comes and tells him: "Give me the wheat, because I want to sell it and use the money to purchase wine," and in response, the borrower tells him: "Go out and consider the debt as a debt of wine, according to the present market price of wine." If he possesses wine, it is permitted and it is considered as if he owes him wine. If he does not possess wine, it is forbidden. If the borrower did not possess the commodity desired, but nevertheless, transgressed and transferred the debt into a debt of that commodity, he is not required to pay the debt in the commodity. Even though he did purchase the commodity afterwards, he should pay the lender the money he lent him.