Negative Commandment #68
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
68. It is a negative commandment "do not favor a convert or orphan in judgment"
As it states in Devarim (Deuteronomy) 24:17, "do not show favor in judgment for the convert or orphan." If a person transgresses and favors a convert or orphan in judgment, he has transgressed two negative commandments (one is 'you shall not judge with injustice' (Vayikra/Leviticus 19:15) and this negative commandment.)
This applies in all places and at all times.