Negative Commandments 49 & 50
Sefer Ha’mitzvos Ha’Katzar (The concise book of mitzvos)
By the Chofetz Chaim
This book lists the Torah mitzvos that can be observed today
Second Section – the Negative Commandments
49. & 50. It is a negative commandment "Do not hurt a righteous convert to Judaism with harmful words"
As it states in Shemos (Exodus) 22:20, "Do not hurt a convert."
It is also a negative commandment "Do not cheat a righteous convert to Judaism out of money"
As it states in Shemos (Exodus) 22:20, "and do not oppress him." These negative commandments are in addition to the previous negative commandments we have mentioned in reference to all other Jews.
This applies in all places and at all times, for men and for women.