Even though they didn't have the New Testament story of Jesus at the well or Paul's letters, Lehi, Nephi and their righteous descendants definitely were familiar with this symbolism. One example is found in 2 Nephi 25:20
And now, my brethren, I have spoken plainly that ye cannot err. And as the Lord God liveth that Israel up out of the land of Egypt, and gave unto Moses power that he should the nations after they had been bitten by the poisonous serpents, if they would cast their eyes unto the which he did raise up before them, and also gave him power that he should smite the and the water should come forth; yea, behold I say unto you, that as these things are , and as the Lord God liveth, there is none other given under heaven save it be this Jesus Christ, of which I have spoken, whereby man can be saved.I don't think it's a coincidence that Nephi uses the story of Moses smiting a rock as an example when he testifies of the salvation through Christ. As a side note, I also noticed the repetitive resumption in this verse and marked it in yellow.
We also see the "my rock and my salvation" and "the rock of my salvation" language from the Old Testament echoed in the Book of Mormon.
Psalm 95:1
O come, let us unto the Lord: let us make a noise to the of our salvation.2 Nephi 4:30
Rejoice, O my , and cry unto the Lord, and say: O Lord, I will praise thee forever; yea, my soul will rejoice in thee, my God, and the of my salvation.No wonder we refer to 2 Nephi 4 as Nephi's psalm. There are multiple other examples both from the Bible and the Book of Mormon and I will not list them all. But I actually started looking into this when I read 1 Nephi 13:36
And in them [the Nephite records] shall be written my , saith the Lamb, and my and my salvation.I was a bit puzzled by the way it was phrased. It seems that the verse is saying that "my rock and my salvation" shall be written in the records. This use of the expression would deviate a bit from the norm. Considering the fact that the punctuation was not part of the original text and placed there by the printer, E. B. Grandin, perhaps it would be better to drop the comma after Lamb. "saith the Lamb and my rock and my salvation", changes the meaning and is perhaps a better one, in my opinion, more in line with the other similar expressions in the scriptures.
We have seen before that Jacob seems particularly fond of the Book of Psalms and he uses this expression both in 2 Nephi 9:45
O, my beloved brethren, turn away from your sins; shake off the of him that would bind you fast; come unto that God who is the of your salvation.and in Jacob 7:25
Wherefore, the people of Nephi did fortify against them with their arms, and with all their might, trusting in the God and of their salvation;I will create another post tomorrow looking further into the use of rocks as symbol in the Book of Mormon.