Numbers 9:13-14

13But the man who is [ceremonially] clean and is not on a journey, and yet does not observe the Passover, that person shall be cut off from among his people [excluding him from the atonement made for them] because he did not bring the Lord’s offering at its appointed time; that man will bear [the penalty of] his sin.

14If a stranger lives among you as a resident alien and observes the Passover to the Lord, in accordance with its statutes and its ordinances, so shall he do; you shall have one statute, both for the resident alien and for the native of the land.’ ”