Encyclopedia of Mormonism, pg. 158; “According to a prophecy of Joseph in Egypt, preserved in the Book of Mormon (2 Ne. 3:4-21), two sets of records would be kept by two tribes of Israel-one (the Bible) written by the tribe of Judah and the other (Book of Mormon) kept by the tribe of Joseph (2 Ne. 3:12; cf. Ezek. 37:15-19).”
2 Peter 1:20-21; “Knowing this first, that no prophecy of the scripture is of any private interpretation. 21 For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost.”
The Bible wasn’t written by the tribe of Judah in the BC era.
Who or what is the tribe of Joseph?