Numbers 9:10-13

10“Speak to the children of Israel, saying: ‘If anyone of you or your posterity is unclean because of a corpse, or is far away on a journey, he may still keep the Lord’s Passover.

11On the fourteenth day of the second month, at twilight, they may keep it. They shall eat it with unleavened bread and bitter herbs.

12They shall leave none of it until morning, nor break one of its bones. According to all the ordinances of the Passover they shall keep it.

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