Really good, Hugh Nibley, Ensign, September 1990, Atonement Part 3. "Before approaching the tabernacle or tent covering the ark, Aaron and his sons would be washed at the gate (see Ex. 29:4); then they would be clothed with the ephod, apron, and sash (Ex. 29:5), and a mitre, a flat cap or pad which may have been meant to support the weight of a crown, was placed on their heads (Ex. 29:6). The priests were also anointed with oil (Ex. 29:7) and consecrated or set apart (Ex. 29:9). Then they put their hands upon the head of a bullock (Ex. 29:10), transferring their guilt to the animal, which was slain. Its blood was put upon the horns of the altar (Ex. 29:12), which represented the four corners of the world. Two rams were then slain, and their blood was sprinkled on the altar as an atonement for all; then blood from the second ram was placed upon the right ear and right thumb of Aaron. (See Ex. 29:15–20.) The blood was also sprinkled over the garments of the priests (Ex. 29:21), who then ate parts of the ram with bread, Aaron and his sons “eat[ing] those things wherewith the atonement was made” (Ex. 29:22–24, 32–33). Each day for seven days, a bullock was offered for atonement. (Ex. 29:36–37.) Then the Lord received the high priest at the tent door, the veil (in Lev. 16:17–19, the high priest alone enters the tabernacle), and conversed with him (Ex. 29:42), accepting the sin offering, sanctifying the priests and people, and receiving them into his company to “dwell among the children of Israel, and [to] be their God” (Ex. 29:45)."
Again Nibley, same source. "There is one expression connected with the ceremonies that seem strangely paradoxical. It is having one’s garments washed white with the blood of the Lamb. Washed white with blood? The Book of Mormon clarifies the apparent contradiction. Alma tells us that “there can no man be saved except his garments are washed white; yea, his garments must be purified until they are cleansed from all stain, through the blood of him of whom it has been spoken by our fathers, who should come to redeem his people from their sins.
“And now I ask of you, my brethren, how will any of you feel, if ye shall stand before the bar of God, having your garments stained with blood and all manner of filthiness? Behold, what will these things testify against you?
“Behold will they not testify that ye are murderers, … guilty of all manner of wickedness?” (Alma 5:21–23.)
Being guilty of the blood and sins of your generation, you may not “have a place to sit down in the kingdom of God, with Abraham, with Isaac, and with Jacob, and also all the holy prophets, whose garments are cleansed and are spotless, pure and white.” (Alma 5:24.) This is nothing less than the yeshivah, literally “sitting down” in the presence of God. 16
Note that there are two kinds of blood-stained garments here—the one showing the blood and sins of this world, the other attesting (for Alma expressly states that “these things testify”) that Aaron and his sons have completed the sacrifice of the Lamb and thus cleansed the people of their defilements, and their garments are white. The blood that washes garments clean is not the blood that defiles them, just as the serpent that healed the people in the wilderness was not the serpent that killed. (See Num. 21:9.)"
Ezra Taft Benson, Jan 1991 Ensign, First Presidency Message, "Here the Lord declares another great purpose of a stake: to be a beautiful emblem for all the world to see. The phrase “put on her beautiful garments” refers, of course, to the inner sanctity that must be attained by every member who calls himself or herself a Saint. Zion is “the pure in heart.” (D&C 97:21."
