Numbers 9:9-12

9And Jehovah spoke to Moses, saying,

10Speak unto the children of Israel, saying, If any one of you or of your generations be unclean by reason of a dead body or be on a journey afar off, yet he shall hold the passover to Jehovah.

11In the second month, on the fourteenth day, between the two evenings, shall they hold it; with unleavened bread and bitter herbs shall they eat it.

12They shall leave none of it until the morning, nor break a bone thereof: according to every ordinance of the passover shall they hold it.