Purge out therefore the old leaven, that ye may be a new lump… For …

This month shall be unto you the beginning of months: it shall be the first month of the year to you.

Exodus 12:2 (KJV)

In the tenth day of this month they shall take to them every man a lamb, according to the house of their fathers, a lamb for an house.

Exodus 12:3 (KJV)

Your lamb shall be without blemish, a male of the first year: ye shall take it out from the sheep, or from the goats.

Exodus 12:5 (KJV)

And they shall take of the blood, and strike it on the two side posts and on the upper door post of the houses, wherein they shall eat it.

Exodus 12:7 (KJV)

And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it.

Exodus 12:8 (KJV)

And thus shall ye eat it; with your loins girded, your shoes on your feet, and your staff in your hand; and ye shall eat it in haste: it is the LORD's passover.

Exodus 12:11 (KJV)