'Day of Atonement' in the Bible

"However, on the tenth day of this seventh month is the Day of Atonement. It's a sacred assembly for you. Humble yourselves and bring an offering made by fire to the LORD.

You are not to do any work that same day. It's the Day of Atonement, because your atonement is made in the presence of the LORD your God.

Sound a horn on the tenth day of the seventh month of this fiftieth year. Likewise, on the Day of Atonement, sound the horn throughout your land.