Ezekiel 45:20 in the World English Bible
So you shall do on the seventh day of the month for everyone who errs, and for him who is simple. So you shall make atonement for the house.
Context
19 And the priest shall take of the blood of the sin offering, and put it upon the posts of the house, and upon the four corners of the settle of the altar, and upon the posts of the gate of the inner court.
20 And so thou shalt do the seventh day of the month for every one that erreth, and for him that is simple: so shall ye reconcile 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.