Hebrew for the Day of Atonement, described in Lev. 16, and observed as a fast on the tenth day of the seventh month (Lev. 16: 29), and a day still very widely observed by Jews. It was the one day of the year when the high priest entered the Holy of Holies in the inmost court of the Temple to offer incense. The ritual of this day is used in Heb. 8–9 to explain the sacrificial work of Christ.