'Keep the Passover' in the Bible

"Moreover let the children of Israel keep the Passover in its appointed season.

Moses spoke to the children of Israel, that they should keep the Passover.

There were certain men, who were unclean because of the dead body of a man, so that they could not keep the Passover on that day, and they came before Moses and before Aaron on that day.

"Say to the children of Israel, 'If any man of you or of your generations is unclean by reason of a dead body, or is on a journey far away, he shall still keep the Passover to Yahweh.

But the man who is clean, and is not on a journey, and fails to keep the Passover, that soul shall be cut off from his people. Because he didn't offer the offering of Yahweh in its appointed season, that man shall bear his sin.

"'If a foreigner lives among you, and desires to keep the Passover to Yahweh; according to the statute of the Passover, and according to its ordinance, so shall he do. You shall have one statute, both for the foreigner, and for him who is born in the land.'"