Numbers 9:2
Ver. 2. Let the children of Israel also keep the passover,.... Though this ordinance was enjoined the people of Israel, and observed by them at the time of their coming out of Egypt, and had been since repeated, Le 23:5; yet without a fresh precept, or an explanation of the former, they seemed not to be obliged, or might not be sensible that they were obliged to keep it, until they came into the land of Canaan, Ex 12:25; and therefore a new order is given them to observe it:
at his appointed season; and what that season is is next declared.