Leviticus 22:17,18

The Lord spake unto Moses The following laws relate to the qualifications required in any offering made either by the Israelites or proselytes. For such proselytes as had renounced idolatry, and were proselytes of the gate, termed, Leviticus 22:18, strangers in Israel Though not circumcised, and obliged to keep the whole law of Moses, were yet permitted, in testimony of their worshipping the true God, to offer free- will-offerings at the Jewish altar, as well as proselytes to the whole Mosaic system, termed proselytes of righteousness.