Num Numbers, chapter Book of Numbers, chapter 9
The children of Israel shall also celebrate the Passeouer at ye time appointed thereunto. Exo 12:3; Exo 23:15; Lev 23:5In the fourtenth day of this moneth at euen, ye shall keepe it in his due season: according to all the ordinances of it, and according to all the ceremonies thereof shall ye keepe it.