Bamidbar (Num.) 9:1, which begins the section related to Pesach Sheni says that the event occurred in the second year from leaving Egypt. Beginning in verse 9, we learn about the laws of Pesach Sheni. ...
Rashi says that one of the meanings of Aharon's prayer regarding Miriam ("Let her not be like the dead, which comes out of his mother's womb with half his flesh consumed!"; Bamidbar 12:12) was that ...