Leviticus 16:1

The chronological link connecting the following law with the death of the sons of Aaron (Lev 10:1-5) was intended, not only to point out the historical event which led to the appointment of the day of atonement, but also to show the importance and holiness attached to an entrance into the inmost sanctuary of God. The death of Aaron's sons, as a punishment for wilfully "drawing near before Jehovah," was to be a solemn warning to Aaron himself, "not to come at all times into the holy place within the vail, before the mercy-seat upon the ark," i.e., into the most holy place (see Exo 25:10.), but only at the time to be appointed by Jehovah, and for the purposes instituted by Him, i.e., according to Lev 16:29., only once a year, on the day of atonement, and only in the manner prescribed in Lev 16:3., that he might not die. - "For I will appear in the cloud above the capporeth." The cloud in which Jehovah appeared above the capporeth, between the cherubim (Exo 25:22), was not the cloud of the incense, with which Aaron was to cover the capporeth on entering (Lev 16:13), as Vitringa, Bhr, and others follow the Sadducees in supposing, but the cloud of the divine glory, in which Jehovah manifested His essential presence in the most holy place above the ark of the covenant. Because Jehovah appeared in this cloud, not only could no unclean and sinful man go before the capporeth, i.e., approach the holiness of the all-holy God; but even the anointed and sanctified high priest, if he went before it at his own pleasure, or without the expiatory blood of sacrifice, would expose himself to certain death. The reason for this prohibition is to be found in the fact, that the holiness communicated to the priest did not cancel the sin of his nature, but only covered it over for the performan…

Here is, I. The date of this law concerning the day of atonement: it was after the death of the two sons of Aaron (Lev 16:1), which we read, Lev 10:1. 1. Lest Aaron should fear that any remaining guilt of that sin should cleave to his family, or (seeing the priests were so apt to offend) that some after-sin of his other sons should be the ruin of his family, he is directed how to make atonement for his house, that it might keep in with God; for the atonement for it would be the establishment of it, and preserve the entail of the blessing upon it. 2. The priests being warned by the death of Nadab and Abihu to approach to God with reverence and godly fear (without which they came at their peril), directions are here given how the nearest approach might be made, not only without peril, but to unspeakable advantage and comfort, if the directions were observed. When they were cut off for an undue approach, the rest must not say, "Then we will not draw near at all," but, "Then we will do it by rule." They died for their sin, therefore God graciously provides for the rest, that they die not. Thus God's judgments on some should be instructions to others. II. The design of this law. One intention of it was to preserve a veneration for the most holy place, within the veil, where the shechinah, or divine glory, was pleased to dwell between the cherubim: Speak unto Aaron, that he come not at all times into the holy place, Lev 16:2. Before the veil some of the priests came every day to burn incense upon the golden altar, but within the veil none must ever come but the high priest only, and he but on one day in the year, and with great ceremony and caution. That place where God manifested his special presence must not be made common. If none must come into the presence-chamber of an…

16:1-34 The Day of Atonement, the tenth day of the seventh month (see 16:29; 23:27; Num 29:7), was the most solemn day of the year for Israelites. It was the only required fast, and it was a Sabbath of rest for all the people (Lev 23:32). Introduced by the Festival of Trumpets (Num 29:1, 7-11), it was the day when the corporate sins of the community were atoned for. Only the high priest (Aaron) could officiate, because only he could represent all the people, including other priests (Aaron’s sons). The Day of Atonement is celebrated today as Yom Kippur.