Numbers 9:9-12

9Then the Lord spoke to Moses, saying,

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.