Numbers 9:2

Let the children of Israel also keep the passover at his appointed season.

Let the children of Israel ... The date of this command to keep the Passover in the wilderness was given shortly after the erection and consecration of the tabernacle, and preceded the numbering of the people by a month (cf. Numbers 9:1 with Numbers 1:1). But it is narrated after that transaction, in order to introduce the notice of a particular case, for which a law was provided to meet the occasion. This was the first observance of the Passover since the exodus; and, without a positive injunction, the Israelites were under no obligation to keep it until their settlement in the land of Canaan (Exodus 12:25).

The anniversary was kept on the exact day of the year on which they, twelve months before, had departed from Egypt; and it was marked by all the special rites-the he-lamb and the unleavened bread. The materials would be easily procured-the lambs from their numerous flocks, and the meal for the unleavened bread, by the aid of Jethro, from the land of Midian, which was adjoining their camp (Exodus 3:1). But their girded loins, their sandaled feet, and their staff in their hand, being mere circumstances attending a hurried departure, and not essential to the rite were not repeated. It is supposed to have been the only observance of the feast during their forty years wandering; and Jewish writers say that, as none could eat the Passover except they were circumcised (Exodus 12:43; Exodus 12:48), and circumcision was not practiced in the wilderness, there could be no circumcised (Exodus 12:43; Exodus 12:48), and circumcision was not practiced in the wilderness, there could be no renewal of the paschal solemnity.