252 – Negative Mitzvah 252 - Not to wrong a convert with words – 252 - המצווה הרנ"ב - האזהרה שגם הוזהרנו מלהונות את הגר בדברים

From Sefer Hamitzvos Daily study - Rabbi Chaim Wolosow by R Chaim Wolosow.

This mitzvah is the prohibition against wronging a convert with words, from "You shall not wrong a convert" (Shemos 22:20), repeated in Vayikra 19:33. The Sifra explains: one may not say to him, "Yesterday you worshipped idols, and now you have come under the wings of the Shechinah."

https://www.torahrecordings.com/rambam_sefer_hamitzvos/002/252