Numbers 15:14-16

And if a stranger sojourn with you, or whosoever be among you in your generations, and will offer an offering made by fire, of a sweet savour unto the LORD; as ye do, so he shall do.

A stranger - one who had become a proselyte. There was not any of the national privileges of the Israelites, with hardly an exception, in which the Gentile stranger might not, on conforming to certain conditions, fully participate.