Ezekiel 45:19-21

American Standard Version

¹⁹ And the priest shall take of the blood of the sin-offering, and put it upon the door-posts of the house, and upon the four corners of the ledge of the altar, and upon the posts of the gate of the inner court. ²⁰ And so thou shalt do on the seventh day of the month for every one that erreth, and for him that is simple: so shall ye make atonement for the house.

²¹ In the first month, in the fourteenth day of the month, ye shall have the passover, a feast of seven days; unleavened bread shall be eaten.