The LORD spoke to Moses, saying, “Speak to the people of Israel, saying, If any one of you or of your descendants is unclean through touching a dead body, or is on a long journey, he shall still keep the Passover to the LORD.” (Num 9:9–10)
And when [Pilate] learned from the centurion that [Jesus] was dead, he granted the corpse to Joseph. And Joseph bought a linen shroud, and taking him down, wrapped him in the linen shroud and laid him in a tomb that had been cut out of the rock. And he rolled a stone against the entrance of the tomb. (Mark 15:45–46)
Joseph of Arimathea buried Jesus and remained ceremonially clean to eat the Passover because God made the provision for him while Israel wandered in the wilderness.