במדבר, פרק ט׳, פסוק ד׳

Celebrating the Passover in the wilderness required the Israelites to transition from knowing general laws to applying them in an unfamiliar environment. The original instructions for the Passover offering tied the practice to entering the Land of Israel. Without a new, clear directive from God, the people would naturally assume they were exempt from this duty while wandering in the desert [שפתי חכמים, מזרחי]. Even if the core obligation still applied during their travels, a fresh command was necessary to clarify that the practice was not put on hold until they reached their destination [משכיל לדוד].

God's instructions to Moses notably lacked the standard prompt to speak to the Israelites. This omission suggests that the people already knew the foundational rules from their time at Mount Sinai and did not need to relearn the basics [שפתי חכמים, גור אריה]. This raises a question regarding why Moses needed to address the nation at this specific moment [רש"י, גור אריה].

The primary approach among commentators is that while Moses had indeed taught the festival laws previously, he needed to review them as the actual time for the offering approached. He guided the Israelites through every practical detail, ensuring they were fully prepared to apply the laws in real-time [העמק דבר]. Another perspective suggests that Moses spoke to them to emphasize the exact timing, ensuring the offering would take place precisely in the month of Nissan during the spring season [מלבי"ם].

A subtle omission in the spelling of the word used for performing the offering serves as a historical hint. It reveals that throughout all their remaining years of wandering in the desert, the Israelites did not bring another Passover offering, making this particular event entirely unique [קיצור בעל הטורים].