Positive commandment · Mitzvat Aseh #198 of 613
To lend to a gentile at interest
להלוות לנוכרי בריבית
The verse · Devarim 23:21
לַנׇּכְרִי תַשִּׁיךְ וּלְאָחִיךָ לֹא תַשִּׁיךְ לְמַעַן יְבָרֶכְךָ ה׳ אֱלֹהֶיךָ בְּכֹל מִשְׁלַח יָדֶךָ עַל־הָאָרֶץ אֲשֶׁר־אַתָּה בָא־שָׁמָּה לְרִשְׁתָּהּ
“to a stranger thou mayst give interest; but to thy brother thou shalt not give interest: that the Lord thy God may bless thee in all that thou settest thy hand to in the land into which thou goest to possess it.”
The Rambam’s words
To lend to a gentile at interest, as [Deuteronomy 23:21] states: "Take interest from a gentile." Based on the oral tradition, we have learned that this is a positive commandment.
להלוות לנוכרי בריבית, שנאמר: "לנוכרי תשיך" (דברים כג,כא); מפי השמועה למדו שזו מצות עשה.
Why · Sefer HaChinuch #573
To lend to the gentile with interest
“It is from the roots of the commandment that it is fitting for us to do acts of loving-kindness only to the nation that knows G-d and serves in front of Him.”
Who & when
“And [it] is practiced in every place and at all times by males and females.”
Where in the Mishneh Torah
Hilchot Creditor and Debtor הלכות מלווה ולווה