Its celebration is prescribed in Lev. xvi.; xxiii. 26–32; Num. xxix. 7–11. The day was to be regarded as a _high Sabbath_, a day of _holy Convocation_, on which the Israelites, under pain of extirpation, were expected to _afflict their souls_ with fasting and mourning. (Comp. Lev. xvi. 29, 31 with Acts xxvii. 9.) The ritual was as follows. The High-priest having bathed, arrayed himself not in his gorgeous robes, but in the white linen garments common to himself and the rest of the priesthood. As a sacrifice for himself and the priests he brought a bullock for a Sin-offering, and a ram for a Burnt-offering, which he had purchased at his own cost; as a sacrifice for the people two he-goats for a Sin-offering, and a ram for a Burnt-offering, which were purchased out of the public treasury. The two he-goats he then brought to the Door of the Tabernacle, _i.e._ to the Brazen Altar, and there having presented them before the Lord, cast two lots upon them, one inscribed _for Jehovah_, the other for _Azazel_[98]. This done, as the head of a priesthood itself _compassed with infirmity_ (Heb. v. 2), he first proceeded to make atonement for his own order. Accordingly he slew the bullock, and taking a censer filled with live coals from the Altar of Burnt-offering and two handfuls of Incense, he passed with these through the Holy Place onwards behind the veil into the Holy of Holies, and there threw the incense upon the coals so that the fragrant cloud might envelope the Mercy-Seat. Then returning to the Brazen Altar and taking some of the blood of the bullock in a vessel he once more passed into the Holy of Holies, and sprinkled it seven times before the Mercy-Seat, the seat of the glory of Jehovah. Having thus made expiation for himself and his own order, he slew the goat upon which the lot _for Jehovah_ had fallen as a Sin-offering for the people, and sprinkled its blood as he had done that of the bullock. Then on his return from the Holy of Holies he purified the Holy Place, now solitary and deserted, by sprinkling the blood of both victims seven times on the horns of the Golden Altar of Incense, and, as some think, on those of the Altar of Burnt-offering.