'Passover' in the Bible

Moreover, they shall take some of the blood and put it on the two doorposts and on the lintel [above the door] of the houses in which they eat it.

Now you are to eat it in this manner: [be prepared for a journey] with your loins girded [that is, with the outer garment tucked into the band], your sandals on your feet, and your staff in your hand; you shall eat it quickly—it is the Lord’s Passover.

[In the celebration of the Passover in future years,] seven days you shall eat unleavened bread, but on the first day you shall remove the leaven from your houses [because it represents the spread of sin]; for whoever eats leavened bread on the first day through the seventh day, that person shall be cut off and excluded from [the atonement made for] Israel.

Then Moses called for all the elders of Israel and said to them, “Go and take a lamb for yourselves according to [the size of] your families and slaughter the Passover lamb.

you shall say, ‘It is the sacrifice of the Lord’s Passover, for He passed over the houses of the Israelites in Egypt when He struck the Egyptians, but spared our houses.’” And the people bowed [their heads] low and worshiped [God].

The Lord said to Moses and Aaron, “This is the ordinance of the Passover: no foreigner is to eat it;

If a stranger living temporarily among you wishes to celebrate the Passover to the Lord, all his males must be circumcised, and then he may participate and celebrate it like one that is born in the land. But no uncircumcised person may eat it.

“You shall not offer the blood of My sacrifice with leavened bread, nor shall the sacrifice of the Feast of the Passover (Unleavened Bread) be left over until morning.