'Keep the Passover' in the Bible

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

And Moses spake unto the children of Israel, that they should keep the passover.

And there were certain men, who were unclean by reason 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:

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

But the man that is clean, and is not on a journey, and forbeareth to keep the passover, that soul shall be cut off from his people; because he offered not the oblation of Jehovah in its appointed season, that man shall bear his sin.

And if a stranger shall sojourn among you, and will keep the passover unto Jehovah; according to the statute of the passover, and according to the ordinance thereof, so shall he do: ye shall have one statute, both for the sojourner, and for him that is born in the land.