זוהר ויקרא — דף לח ע”ב
Summary
Regarding the command "take a goat as a sin offering," it is explained that the reason is that Israel had first offered sacrifices to the goat-demons ruling over the high mountains; they therefore needed to be purified of that sin, and furthermore to provide for the renewal of the moon. The bull and the ram, by contrast, are offered specifically as peace offerings, and not a young bullock, because the bull is whole and displays peace, while the ram refers to Isaac's ram; they are offered up as peace offerings in order to perfect the Community of Israel.<br />
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All the joy of that day came from the fact that the Community of Israel was crowned and blessed, in its completeness, through the priest; it was the shared joy of the beings above and below. But Nadab and Abihu caused a disturbance between the Queen and the King, and therefore "a fire went out from before the Lord and consumed them." Eleazar and Ithamar were then told "do not let your hair go loose," for the deed below must appear just like the deed above.<br />
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It is explained that all the joy above depends on that holy oil, and therefore the priest, upon whom the anointing oil flows, must display joy and a radiant face, with no blemish appearing on him at all. And had Eleazar and Ithamar shown any blemish in their garments or on their heads at that hour when judgment was in force, they would not have been saved.<br />
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It is further related that Elisheva was fitting for Aaron from the day the world was created, just as Bathsheba was fitting for David. But there, the union was for judgment, to wage wars and shed blood, whereas here the union was for peace, joy, and a radiant face. Regarding the phrase "the sound of the shofar," it is explained that this is Jacob, who includes all the patriarchs as one, and that from that same shofar come forth seven sounds which first give drink to the fathers, and afterward to the sons.<br />
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All the joy of that day came from the fact that the Community of Israel was crowned and blessed, in its completeness, through the priest; it was the shared joy of the beings above and below. But Nadab and Abihu caused a disturbance between the Queen and the King, and therefore "a fire went out from before the Lord and consumed them." Eleazar and Ithamar were then told "do not let your hair go loose," for the deed below must appear just like the deed above.<br />
<br />
It is explained that all the joy above depends on that holy oil, and therefore the priest, upon whom the anointing oil flows, must display joy and a radiant face, with no blemish appearing on him at all. And had Eleazar and Ithamar shown any blemish in their garments or on their heads at that hour when judgment was in force, they would not have been saved.<br />
<br />
It is further related that Elisheva was fitting for Aaron from the day the world was created, just as Bathsheba was fitting for David. But there, the union was for judgment, to wage wars and shed blood, whereas here the union was for peace, joy, and a radiant face. Regarding the phrase "the sound of the shofar," it is explained that this is Jacob, who includes all the patriarchs as one, and that from that same shofar come forth seven sounds which first give drink to the fathers, and afterward to the sons.<br />
Torat Emet / Rav Pinhas Reuven — CC BY-NC-SA 2.5
in Hebrew