Numbers 9:10

7 and those men said to him, We are unclean by reason of the dead body of a man: why are we kept back, that we may not offer the offering of Yahweh in its appointed season among the children of Israel?

8 Moses said to them, Stay you, that I may hear what Yahweh will command concerning you.

9 Yahweh spoke to Moses, saying,

10 Speak to the children of Israel, saying, If any man of you or of your generations shall be unclean by reason of a dead body, or be on a journey afar off, yet he shall keep the Passover to Yahweh.

11 In the second month on the fourteenth day at even they shall keep it; they shall eat it with unleavened bread and bitter herbs:

12 they shall leave none of it to the morning, nor break a bone of it: according to all the statute of the Passover they shall keep it.

13 But the man who is clean, and is not on a journey, and forbears to keep the Passover, that soul shall be cut off from his people; because he didn`t offer the offering of Yahweh in its appointed season, that man shall bear his sin.