'Passover' in the Bible
Let the children of Israel keep the Passover at its regular time.
So they kept the Passover in the first month, on the fourteenth day of the month, at evening, in the waste land of Sinai: as the Lord gave orders to Moses, so the children of Israel did.
And there were certain men who were unclean because of a dead body, so that they were not able to 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 one of you or of your families is unclean because of a dead body, or is on a journey far away, still he is to keep the Passover to the Lord:
Nothing of it is to be kept till the morning, and no bone of it is to be broken: they are to keep it by the rules of the Passover.
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.
And if a man from another country is among you and has a desire to keep the Passover to the Lord, let him do as is ordered in the law of the Passover: there is to be the same rule for the man from another nation and for him who had his birth in the land.
And in the first month, on the fourteenth day of the month, is the Lord's Passover.
On the fifteenth day of the first month they went out from Rameses; on the day after the Passover the children of Israel went out by the power of the Lord before the eyes of all the Egyptians,