Negative Commandment #19
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
19. It is a negative commandment not to marry with a non-Jew
As it states in Devarim (Deuteronomy) 7:3, "You shall not marry with them."
This applies in all places and at all times, for men and for women.