Nephi:
-And now I, Nephi, write more of the words of Isaiah, for my soul delighteth in his words. For I will liken his words unto my people, and I will send them forth unto all my children, for he verily saw my Redeemer, even as I have seen him.... 8 And now I write some of the words of Isaiah, that whoso of my people shall see these words may lift up their hearts and rejoice for all men. Now these are the words, and ye may liken them unto you and unto all men. (2 Ne 11:2,8).
-And [the Lord] surely did show unto the prophets of old all things concerning them; and also he did show unto many concerning us; wherefore, it must needs be that we know concerning them for they are written upon the plates of brass. Now it came to pass that I, Nephi, did teach my brethren these things; and it came to pass that I did read many things to them, which were engraven upon the plates of brass, that they might know concerning the doings of the Lord in other lands, among people of old. And I did read many things unto them which were written in the books of Moses; but that I might more fully persuade them to believe in the Lord their Redeemer I did read unto them that which was written by the prophet Isaiah; for I did liken all scriptures unto us, that it might be for our profit and learning. Wherefore I spake unto them, saying: Hear ye the words of the prophet, ye who are a remnant of the house of Israel, a branch who have been broken off; hear ye the words of the prophet, which were written unto all the house of Israel, and liken them unto yourselves, that ye may have hope as well as your brethren from whom ye have been broken off; for after this manner has the prophet written (1 Ne 19:21-24)
-Now I, Nephi, do speak somewhat concerning the words which I have written, which have been spoken by the mouth of Isaiah. For behold, Isaiah spake many things which were hard for many of my people to understand; for they know not concerning the manner of prophesying among the Jews. For I, Nephi, have not taught them many things concerning the manner of the Jews; for their works were works of darkness, and their doings were doings of abominations. Wherefore, I write unto my people, unto all those that shall receive hereafter these things which I write, that they may know the judgments of God, that they come upon all nations, according to the word which he hath spoken. Wherefore, hearken, O my people, which are of the house of Israel, and give ear unto my words; for because the words of Isaiah are not plain unto you, nevertheless they are plain unto all those that are filled with the spirit of prophecy. But I give unto you a prophecy, according to the spirit which is in me; wherefore I shall prophesy according to the plainness which hath been with me from the time that I came out from Jerusalem with my father; for behold, my soul delighteth in plainness unto my people, that they may learn. Yea, and my soul delighteth in the words of Isaiah, for I came out from Jerusalem, and mine eyes hath beheld the things of the Jews, and I know that the Jews do understand the things of the prophets, and there is none other people that understand the things which were spoken unto the Jews like unto them, save it be that they are taught after the manner of the things of the Jews. But behold, I, Nephi, have not taught my children after the manner of the Jews; but behold, I, of myself, have dwelt at Jerusalem, wherefore I know concerning the regions round about; and I have made mention unto my children concerning the judgments of God, which hath come to pass among the Jews, unto my children, according to all that which Isaiah hath spoken, and I do not write them (2 Ne 25:1-6)
Jacob:
-And now, behold, I would speak unto you concerning things which are, and which are to come; wherefore, I will read you the words of Isaiah. And they are the words which my brother has desired that I should speak unto you. And I speak unto you for your sakes, that ye may learn and glorify the name of your God. And now, the words which I shall read are they which Isaiah spake concerning all the house of Israel; wherefore, they may be likened unto you, for ye are of the house of Israel. And there are many things which have been spoken by Isaiah which may be likened unto you, because ye are of the house of Israel (2 Ne 6:4-5)
Jesus Christ:
-And now, behold, I say unto you, that ye ought to search these things. Yea, a commandment I give unto you that ye search these things diligently; for great are the words of Isaiah. For surely he spake as touching all things concerning my people which are of the house of Israel; therefore it must needs be that he must speak also to the Gentiles. And all things that he spake have been and shall be, even according to the words which he spake. Therefore give heed to my words; write the things which I have told you; and according to the time and the will of the Father they shall go forth unto the Gentiles. And whosoever will hearken unto my words and repenteth and is baptized, the same shall be saved. Search the prophets, for many there be that testify of these things (3 Ne 23:1-5)
Moroni:
-Search the prophecies of Isaiah. Behold, I cannot write them. Yea, behold I say unto you, that those saints who have gone before me, who have possessed this land, shall cry, yea, even from the dust will they cry unto the Lord; and as the Lord liveth he will remember the covenant which he hath made with them (Mormon 8:23).