Charles Spurgeon Commentary Numbers 9:1-2

"And Jehovah spake unto Moses in the wilderness of Sinai, in the first month of the second year after they were come out of the land of Egypt, saying, Moreover let the children of Israel keep the passover in its appointed season." — Numbers 9:1-2 (ASV)

I would almost fear that they had omitted keeping the Passover for a year. There was a first celebration of it when they came out of Egypt; but then it was not so much a type as a matter of fact. It was the thing itself—not the remembrance of the coming out of Egypt, but the actual coming out, the exodus.

One might gather from this command of the Lord that, on the first anniversary of that memorable season, the children of Israel had omitted its observance, and so Jehovah said to Moses, Let the children of Israel also keep the passover at his appointed season. If this conjecture is correct, it is very significant that a rite that belonged to the law, and was therefore to pass away, was so soon neglected—and certainly it was afterwards neglected for many, many years. In contrast, the great memorial ordinance of the Christian dispensation—the Lord’s Supper—was not neglected even when Christians were under fierce persecution from the Jews or other nations.

Even when observing that rite among the pagans was almost certain to bring death, Christians still met together on the first day of the week and continually broke bread in remembrance of their Lord's death, just as we do to this day. I suppose that the Supper, which is the memorial of Christ our Passover, has never been entirely neglected throughout the world, but has been constantly observed in the Church of Christ, and will be till he come.