And if a stranger shall sojourn among you, and will keep the passover unto the Lord,.... Then he must become a proselyte of righteousness, and be circumcised, or otherwise be might not eat of the passover, Exodus 12:48; Ben Gersom interprets this of the second passover, and of a proselyte that was not obliged to the first, he not being then a proselyte, but became one between the first and the second; and so Aben Ezra understands it of a second passover, though he observes, that some say the first is meant:

according to the ordinance of the passover, and according to the manner thereof, so shall he do; according to the several rites and ceremonies, whether of the first or second passover, that an Israelite was obliged to observe, the same a proselyte was to observe, and what they were has been already taken notice of:

ye shall have one ordinance, both for the stranger and for him that was born in the land: for a proselyte, and a native of Israel; see Exodus 12:49.

And if a stranger shall sojourn among you, and will keep the passover unto the LORD; according to the ordinance of the passover, and according to the manner thereof, so shall he do: ye shall have one ordinance, both for the stranger, and for him that was born in the land.

9:14 A stranger - Who is a proselyte.

14. if a stranger shall sojourn among you, and will keep the passover-Gentile converts, or proselytes, as they were afterwards called, were admitted, if circumcised, to the same privileges as native Israelites, and were liable to excommunication if they neglected the passover. But circumcision was an indispensable condition; and whoever did not submit to that rite, was prohibited, under the sternest penalties, from eating the passover.

9:1-14 God gave particular orders for the keeping of this passover, and, for aught that appears, after this, they kept no passover till they came to Canaan, Jos 5:10. It early showed that the ceremonial institutions were not to continue always, as so soon after they were appointed, some were suffered to sleep for many years. But the ordinance of the Lord's Supper was not thus set aside in the first days of the Christian church, although those were days of greater difficulty and distress than Israel knew in the wilderness; nay, in the times of persecution, the Lord's Supper was celebrated more frequently than afterward. Israelites in the wilderness could not forget the deliverance out of Egypt. There was danger of this when they came to Canaan. Instructions were given concerning those who were ceremonially unclean, when they were to eat the passover. Those whose minds and consciences are defiled by sin, are unfit for communion with God, and cannot partake with comfort of the gospel passover, till they are cleansed by true repentance and faith. Observe with what trouble and concern these men complained that they were kept back from offering to the Lord. It should be a trouble to us, when by any occasion we are kept back from the solemnities of a sabbath or a sacrament. Observe the deliberation of Moses in resolving this case. Ministers must ask counsel of God's mouth, not determine according to their own fancy or affection, but according to the word of God to the best of their knowledge. And if, in difficult cases, time is taken to spread the matter before God by humble, believing prayer, the Holy Spirit assuredly will direct in the good and right way. God gave directions in this case, and in other similar cases, explanatory of the law of the passover. As those who, against their minds, are forced to absent themselves from God's ordinances, may expect the favours of God's grace under their affliction, so those who, of choice, absent themselves, may expect God's wrath for their sin. Be not deceived: God is not mocked.