This verse is the self-description of the denizen of the temple.
Interestingly, the image of the Lord raising his hand over the sea and speaking to command it connects the two different versions of the parting of the Red Sea. For Nephi, Moses speaks to the waters. For Exodus, Moses stretches out his hand but doesn't speak.
We already know Moses as a temple figure. One thing these verses together might suggest to us is that Nephi's reference to Moses speaking comes not from knowing a different version of Exodus, or some other text, but from knowing Moses as a character in a ritual temple drama.