Rambam - Sefer HaMitzvos: Negative Mitzvah 253: Negative Mitzvah 253

This is not an error of duplication. The full-fledged version of this Mitzvah are many and change for those who are learning the one/three chapter a day. The Message for the day from "Bringing Heaven Down to Earth" at the end of this Mitzvah is different than that of yesterday.

Negative Mitzvah 253: It is forbidden to cheat a convert in business
Exodus 22:20 "We are forbidden to cheat a convert in business deals"

In any case involving business deals, buying or selling, it is forbidden to cheat the convert.

The Torah gives us a special commandment in regard to the Ger in order to make sure that we treat any convert to Judaism just as we would treat any other Jew.

If you want to see the face of the Moshiach, just look at the children!

From: Bringing Heaven Down to Earth by Tzvi Freeman - tzvif@aol.com