Ezekiel 45:20
You must do the same thing on the seventh day of the month for anyone who strays unintentionally or in ignorance. In this way you will make atonement for the temple.
Berean Standard Bible
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.
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.