11 And behold, thou art David, and thou art called to assist; [ His 2 brothers John and Peter are called immediately to preach repentance, while David was given the counsel to have faith and ask in faith to be a witness - which he later was.. See D&C 15 & 16. ] which thing if ye do, and are faithful, ye shall be blessed both spiritually and temporally, and great shall be your reward. Amen.
[ Historical Background While Joseph Smith and Oliver Cowdery worked on the translation of the Book of Mormon at the Prophet’s farm in Harmony, Pennsylvania, persecution began to increase, making it more and more difficult to finish the work. At this time Oliver Cowdery wrote to David Whitmer requesting him to come to Harmony to take him and Joseph Smith to the home of David’s father, Peter Whitmer Sr., who was a resident of Fayette, New York. They wanted to reside with the Whitmer family while they completed the work of translation. Earlier Joseph Smith had become acquainted with Peter Whitmer and several members of the family. Oliver Cowdery had also been corresponding with David Whitmer while the Book of Mormon was translated. Through this correspondence the whole Whitmer family became acquainted with the work of the Restoration. Section 14 Melchizedek Priesthood are sufficiently manifest; else how can the restitution of all things spoken of by the Holy Prophets be brought to pass. It is not to be understood that the law of Moses will be established again with all its rites and variety of ceremonies; this has never been spoken of by the prophets; but those things which existed prior to Moses’ day, namely, sacrifice, will be continued.” (Teachings, pp. 172–73.) President Joseph Fielding Smith further explained that “we are living in the dispensation of the fulness of times into which all things are to be gathered, and all things are to be restored since the beginning. Even this earth is to be restored to the condition which prevailed before Adam’s transgression. Now in the nature of things, the law of sacrifice will have to be restored, or all things which were decreed by the Lord would not be restored. It will be necessary, therefore, for the sons of Levi, who offered the blood sacrifices anciently in Israel, to offer such a sacrifice again to round out and complete this ordinance in this dispensation. Sacrifice by the shedding of blood was instituted in the days of Adam and of necessity will have to be restored. “The sacrifice of animals will be done to complete the restoration when the temple spoken of is built; at the beginning of the millennium, or in the restoration, blood sacrifices will be performed long enough to complete the fulness of the restoration in this dispensation. Afterwards sacrifice will be of some other character.” (Doctrines of Salvation, 3:94.)
Notes and Commentary for Doctrine and Covenants 128:24 contains additional insights into what else might be included in the offering of the sons of Levi. Section 14 The Prophet Joseph Smith recorded that “in the beginning of the month of June, his [Peter Whitmer Sr.’s] son, David Whitmer, came to the place where we were residing, and brought with him a two-horse wagon, for the purpose of having us accompany him to his father’s place, and there remain until we should finish the work. It was arranged that we should have our board free of charge, and the assistance of one of his brothers to write for me, and also his own assistance when convenient. Having much need of such timely aid in an undertaking so arduous, and being informed that the people in the neighborhood of the Whitmers were anxiously awaiting the opportunity to inquire into these things, we accepted the invitation, and accompanied Mr. Whitmer to his father’s house, and there resided until the translation was finished and the copyright secured. Upon our arrival, we found Mr. Whitmer’s family very anxious concerning the work, and very friendly toward ourselves. They continued so, boarded and lodged us according to arrangements; and John Whitmer, in particular, assisted us very much in writing during the remainder of the work. “In the meantime, David, John and Peter Whitmer, Jun., became our zealous friends and assistants in the work; and being anxious to know their respective duties, and having desired with much earnestness that I should inquire of the Lord concerning them, I did so, through the means of the Urim and Thummim, and obtained for them in succession the following revelations: [D&C 14–16].” (History of the Church, 1:48–49.) ]