Ezekiel 45:19-21

Young's Literal Translation

¹⁹ and the priest hath taken of the blood of the sin offering, and hath put on the door-post of the house, and on the four corners of the border of the altar, and on the post of the gate of the inner court.

²⁰ And so thou dost do on the seventh of the month, because of each erring one, and because of the simple one -- and ye have purified the house.

²¹ `In the first [month], in the fourteenth day of the month, ye have the passover, a feast of seven days, unleavened food is eaten.