'Keep the Passover' in the Bible

It happened that some men who were ceremonially defiled by the dead body of a man could not keep the Passover on that day, so they came before Moses and before Aaron on that day.

But the man who is ceremonially clean, and was not on a journey, and fails to keep the Passover, that person must be cut off from his people. Because he did not bring the Lord's offering at its appointed time, that man must bear his sin.

If a resident foreigner lives among you and wants to keep the Passover to the Lord, he must do so according to the statute of the Passover, and according to its custom. You must have the same statute for the resident foreigner and for the one who was born in the land.'"

Observe the month Abib and keep the Passover to the Lord your God, for in that month he brought you out of Egypt by night.