In some details, the present Passover differed both from that kept at the Exodus itself and from all subsequent Passovers. For example, the direction of Exodus 12:22 could not be carried out in the letter while the people were dwelling in tents; and may be regarded as superseded by Leviticus 17:3-6 (compare Deuteronomy 16:5 ff).

In other points, such as how many lambs would be wanted, how the blood of the Paschal victims could be sprinkled upon the altar in the time specified, etc., the administrators of the Law of Moses would here, as elsewhere, have, from the nature of the case, power to order what might be requisite to carry the law into effect.

And they kept the passover on the fourteenth, day of the first month at even in the wilderness of Sinai,.... No mention is made of keeping the feast of unleavened bread seven days, only of the passover, which indeed was only enjoined at this time, though the feast of unleavened bread used to follow it, and did in later times; but perhaps it would not have been an easy matter to have got the flour to make it of, sufficient for so large a body of people, for seven days together in the wilderness; though they might be able to furnish themselves with what was enough for one meal from the neighbouring countries, and especially from Midian, where Jethro, Moses's father, lived, and which was not very far from Sinai, where the Israelites now were:

according to all that the Lord commanded Moses, so did the children of Israel; which is observed to their honour; though Jarchi gives this as a reason why this book does not begin with this account, as the order of things seems to require, because it was to the reproach of the Israelites, that all the forty years they were in the wilderness they kept but this passover only; the reason of which was, because of the omission of circumcision during that time, through the inconveniences of travelling, and the danger of circumcision in it, without which their children could not eat of the passover, Exodus 12:48.

And they kept the passover on the fourteenth day of the first month at even in the wilderness of Sinai: according to all that the LORD commanded Moses, so did the children of Israel.

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.