Leviticus 16:18

“And he shall go out unto the altar that [is] before the Lord, etc.] The golden altar, the altar of incense, which stood in the holy place without the vail, over against the most holy place, where Jehovah dwelt, and so is said to be before him; of this altar the Misnah f567 understands it, and so do Jarchi and Ben Gersom; and, according to (<023010>Exodus 30:10); once a year Aaron was to make an atonement on the horns of it, with the blood of the sin offering, which plainly refers to this time, the day of atonement; but Aben Ezra is of opinion, that the altar of burnt offering is meant; and Bishop Patrick is inclined to think so too, because he supposes the high priest’s going out signifies…”

“It is important, in reference to the meaning of the day of atonement, to observe the order of the rites as they are described in these verses. Leviticus 16:12 A censer - See Exodus 25:38 note. The altar before the Lord - i. e. the altar of burnt-offering on which the fire was always burning. Leviticus 16:14 The high priest must have come out from the most holy place to fetch the blood, leaving the censer smoking within, and then have entered again within the veil. He sprinkled the blood seven times upon the mercy-seat, on its east side (not “eastward”), and then seven times upon the floor in front of it. If the mercy-seat may be regarded as an altar, the holiest one of the three, on this one…”

“The altar before the Lord - That is, the altar of incense, where the blood of sacrifices was to be put, particularly the blood of the sin - offerings offered upon this day of atonement, and which is most properly said to be before the Lord, that is, before the place where God in a special manner dwelt. His going out relates to the holy of holies, into which he was said to go in, Lev 16:17. Leviticus 16:19”

“Lev 16:16, Lev 4:7, Lev 4:18; Exo 30:10; Joh 17:19; Heb 2:11, Heb 5:7, Heb 5:8, Heb 9:22, Heb 9:23 Leviticus 16:19”

“After he had made atonement for the dwelling, Aaron was to expiate the altar in the court, by first of all putting some of the blood of the bullock and he-goat upon the horns of the altar, and then sprinkling it seven times with his finger, and thus cleansing and sanctifying it from the uncleannesses of the children of Israel. The application of blood to the horns of the altar was intended to expiate the sins of the priests as well as those of the nation; just as in the case of ordinary sin-offerings it expiated the sins of individual members of the nation ( Lev 4:25, Lev 4:30, Lev 4:34), to which the priests also belonged; and the sevenfold sprinkling effected the purification of the place…”