Leviticus 22:25 "Neither from a foreigner's hand may you offer the bread of your G‑d from any of these"

HaShem gave seven basic Mitzvot to the non-Jewish people, which are known as "the Seven Commandments of the Children of Noah".

Among these Mitzvot is the Mitzvah in which they are commanded to believe in one G‑d, Creator of the Universe.

Many non-Jewish people do believe in HaShem.

The Torah gave them the opportunity to express their belief by offering sacrifices in the Beit HaMikdash.

In this Negative Mitzvah the Torah tells us that animals which have been brought by non-Jews for sacrifice in the Beit HaMikdash may not have any blemishes.

Just as we are forbidden to offer a blemished animal presented by a Jew as a sacrifice, so, too, we are forbidden to offer a blemished animal presented by a non-Jew as a sacrifice.