JS History 1:69. Upon you my fellow servants, in the name of Messiah, I confer the Priesthood of Aaron, which holds the keys of the ministering of angels, and of the gospel of repentance, and of baptism by immersion for the remission of sins; and this shall never be taken again from the earth until the sons of Levi do offer again an offering unto the Lord in righteousness.
What is the offering that the sons of Levi will make?
Malachi 2:4-17. And ye shall know that I have sent this commandment unto you, that my covenant might be with Levi, saith the Lord of hosts. My covenant was with him of life and peace; and I gave them to him for the fear wherewith he feared me, and was afraid before my name. The law of truth was in his mouth, and iniquity was not found in his lips; he walked with me in peace and equity, and did turn many away from iniquity. For the priest's lips should keep knowledge, and they should seek the law at his mouth: for he is the messenger of the Lord of hosts.
But ye are departed out of the way; ye have caused many to stumble at the law; ye have corrupted the covenant of Levi, saith the Lord of hosts. Therefore have I also made you contemptible and base before all the people, according as ye have not kept my ways, but have been partial in the law.
Have we not all one father? Hath not one God created us? Why do we deal treacherously every man against his brother, by profaning the covenant of our fathers?
Judah hath dealt treacherously, and an abomination is committed in Israel and in Jerusalem; for Judah hath profaned the holiness of the Lord which he loved, and hath married the daughter of a strange god. The Lord will cut off the man that doeth this, the master and the scholar, out of the tabernacles of Jacob, and him that offereth an offering unto the Lord of hosts. And this have ye done again, covering the altar of the Lord with tears, with weeping, and with crying out, insomuch that he regardeth not the offering any more, or receiveth it with good will at your hand.
Yet ye say, Wherefore?
Because the Lord hath been witness between thee and the wife of thy youth, against whom thou hast dealt treacherously; yet is she thy companion, and the wife of thy covenant. And did he not make one? Yet had he the residue of the spirit.
And wherefore one?
That he might seek a godly seed. Therefore take heed to your spirit, and let none deal treacherously against the wife of his youth. For the Lord, the God of Israel, saith that he hateth putting away: for one covereth violence with his garment, saith the Lord of hosts; therefore take heed to your spirit, that ye deal not treacherously. Ye have wearied the Lord with your words.
Yet ye say, Wherein have we wearied him?
When ye say, Every one that doeth evil is good in the sight of the Lord, and he delighteth in them; or, Where is the God of judgment?
D&C 124:35-39. And after this time, your baptisms for the dead, by those who are scattered abroad, are not acceptable unto me, saith the Lord. For it is ordained that in Zion and in her stakes, and in Jerusalem, those places which I have appointed for refuge, shall be the places for your baptisms for your dead. And again, verily I say unto you, how shall your washings be acceptable unto me, except ye perform them in a house which you have built to my name? For, for this cause I commanded Moses that he should build a tabernacle, that they should bear it with them in the wilderness, and to build a house in the land of promise, that those ordinances might be revealed which had been hid from before the world was. Therefore, verily I say unto you, that your anointings, and your washings, and your baptisms for the dead, and your solemn assemblies, and your memorials for your sacrifices by the sons of Levi, and for your oracles in your most holy places wherein you receive conversations, and your statutes and judgments, for the beginning of the revelations and foundation of Zion, and for the glory, honor, and endowment of all her municipals, are ordained by the ordinance of my holy house, which my people are always commanded to build in my holy name.
Malachi 3:1. Behold, I will send my messenger, and he shall prepare the way before me; and the Lord, whom ye seek, shall suddenly come to his temple, even the messenger of the covenant, whom ye delight in; behold he shall come, saith the Lord of Hosts. And he shall sit as a refiner and purifier of silver: and he shall purify the sons of Levi and purge them as gold and silver, that they may offer unto the Lord an offering in righteousness. And I will come near to you to judgment; and I will be a swift witness against the sorcerers, and against the adulterers, and against false swearers, and against those that oppress the hireling in his wages, the widow, and the fatherless, and that turn aside the stranger from his right, and fear not me, saith the Lord of Hosts.
Levites. Descendants of Levi. The work of ministering in the sanctuary was assigned to this tribe. The Levites are sometimes spoken of as distinct from the priests; sometimes as though all Levites were also priests, "the priests, the Levites." The work of the Levites was to assist the priests. They acted as musicians; slaughtered the sacrifices; and generally assisted in the temple. The Levites were themselves offered as a wave-offering on behalf of the children of Israel (Num.8: 11-15); they thus became God's peculiar property, given to him in place of the firstborn (Num.8:16). They had no inheritance in Canaan (Num. 18: 23-24); but they had the tithe (18:21), 48 cities (35:6), and a claim on the alms of the people at feast times (Deut.12:18-19; 14: 27, 29).
I Kings 8:4. And they brought up the ark of the Lord, and the tabernacle of the congregation, and all the holy vessels that were in the tabernacle, even those did the priests and the Levites bring up.