Numbers 9:10-13

10"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.

11In the second month on the fourteenth day at twilight they shall keep it. They shall eat it with unleavened bread and bitter herbs.

12They shall leave none of it until the morning, nor break any of its bones; according to all the statute for the Passover they shall keep it.

13But if anyone who is clean and is not on a journey fails to keep the Passover, that person shall be cut off from his people because he did not bring the Lord's offering at its appointed time; that man shall bear his sin.