'Unintentionally' in the Bible

When they go out into the outer court, into the outer courtyard to the people, they shall take off the garments in which they have been ministering and leave them in the holy chambers; then they shall put on other clothing so that they will not transmit holiness to the people with their [ceremonial] garments.

You must do the same thing on the seventh day of the month for everyone who sins unintentionally or through ignorance. In this way you will make atonement for the temple.