Numbers 9:9-12

9Then the Lord said to Moses,

10“Tell the Israelites: ‘When any of you or your descendants are unclean because of a dead body or are away on a journey, they are still to celebrate the Lord’s Passover,

11but they are to do it on the fourteenth day of the second month at twilight. They are to eat the lamb, together with unleavened bread and bitter herbs.

12They must not leave any of it till morning or break any of its bones. When they celebrate the Passover, they must follow all the regulations.