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
26. It is a negative commandment: do not save an enticer if you see him in danger that could cause death
As it states in Devarim (Deuteronomy) 13:9, “do not let your eye pity him.”