Cross reference
Exodus 12:47
47 All Israel is to keep the feast.
Exodus 12:6
6 Keep it till the fourteenth day of the same month, when everyone who is of the children of Israel is to put it to death between sundown and dark.
Numbers 9:13
13 But the man who, not being unclean or on a journey, does not keep the Passover, will be cut off from his people: because he did not make the offering of the Lord at the regular time, his sin will be on him.
Exodus 12:3
3 Say to all the children of Israel when they are come together, In the tenth day of this month every man is to take a lamb, by the number of their fathers' families, a lamb for every family: