Ezekiel 45:20 YLT

¹⁸  'Thus said the Lord Jehovah: In the first 'month', in the first of the month, thou dost take a bullock, a son of the herd, a perfect one, and hast cleansed the sanctuary:

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.

²²  And the prince hath prepared on that day, for himself, and for all the people of the land, a bullock, a sin-offering.