Matthew Poole and continuators on Numbers 15:15

15 One ordinance shall be both for you of the congregation, and also for the stranger that sojourneth with you, an ordinance for ever in your generations: as ye are, so shall the stranger be before the LORD ▪

(i. e.) As to the worship of God: his sacrifices shall be offered in the same manner and accepted by God upon the same terms, as yours: which was a presage of the future calling of the Gentiles. And this is added by way of caution and distinction, to shew that strangers were not upon this pretence to partake of their civil priviledges.

Marginal references: exod. 12. 49. chap. 9. 14.