Rabbinical Interpretation
According to Rashi, on Numbers 9:1, only once during their forty years of wandering in the wilderness, one year after the Exodus, was the sacrifice offered. For the next 39 years there was no offering, according to Rashi, as God stipulated that it could only be offered after the Children of Israel had entered the Land of Israel. In fact, the bringing of the Pesach sacrifice resumed only after the Israelites had taken possession of the land, and then the sacrifice was made annually until during the times when Solomon's Temple and the Second Temple stood and functioned. During this time there was a definite ritual for the offering, in addition to the regulations prescribed by the Law. The following is a brief summary of the principal ordinances and of the ritual accompanying the sacrifice:
Read more about this topic: Korban Pesach