Numbers 9:10-13

10Speak unto 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 unto Jehovah. 11In the second month on the fourteenth day at even they shall keep it; they shall eat it with unleavened bread and bitter herbs: 12they shall leave none of it unto the morning, nor break a bone thereof: according to all the statute of the passover they shall keep it. 13But the man that is clean, and is not on a journey, and forbeareth to keep the passover, that soul shall be cut off from his people; because he offered not the oblation of Jehovah in its appointed season, that man shall bear his sin.