Deuteronomy 23:21 "You may take interest from a gentile"

It is universally accepted to collect interest on loans.

The Torah forbids taking this extra "bite" from a fellow Jew's pocket (see Negative Mitzvah 235).

Giving up this profit can be quite a sacrifice, as it can amount to a considerable sum!

This Positive Mitzvah teaches us that this consideration must only be shown to Jews and that we may collect interest from gentiles.