The Lord is speaking to Joseph Smith in 1845; “Abraham was commanded to offer his son Isaac; nevertheless, it was written: Thou shalt not kill. Abraham, however, did not refuse, and it was accounted unto him for righteousness.”
It does not say who wrote it first or when just that it is written at some point. It does not say Abraham read the law just that Abraham knew the commandment thou shalt not kill which I already showed you because it was a command given to Noah and Shem.
However in the Book of the Jubilees there is the story of Joseph in Egypt and Potiphar’s wife
“….But he did not surrender his soul, and he remembered the Lord and the words which Jacob, his father, used to read from amongst the words of Abraham, that no man should commit fornication with a woman….”
It seems reasonable that if Abraham wrote down ‘thou shalt not commit adultery’ he probably wrote down ‘thou shalt not kill’ also.
Now here’s the interesting point Joseph Smith would have never read the Book of Jubilees, he would have had no idea that anyone thought Abraham wrote anything.
I found another interesting point in a paper written by E. Douglas Clark
A Prologue to Genesis Moses 1 in Light of Jewish Traditions
“....The prevailing academic theory of the origin of the book of Genesis denies Mosaic authorship, claiming instead that Genesis is a synthesis of several different source documents that were redacted or edited into the Pentateuch long after the time of Moses.
In contrast, ancient Jewish and Christian tradition insisted on the historical Moses as the author of Genesis and the other four books of the Pentateuch. This tenet was memorialized in the thirteenth century by Maimonides as one of Judaism’s thirteen Principles of Faith: “I believe with a perfect faith that the whole Torah
now in our possession is the same that was given to Moses our teacher.”
Modern scholars have similarly noted, “For the Jewish, and to an only somewhat lesser degree, Christian religions it is axiomatic that Moses, ‘our Master’, wrote Genesis.” Curiously, however, as pointed out in the Encyclopaedia Judaica, “Genesis
itself contains no information about its authorship, nor can any biblical passage be cited in support of a tradition concerning it.”
I never thought about it before, the Bible does not say who wrote Genesis, we all just assume it was Moses.
file:///C:/Users/Nancy/Downloads/45.1clarkprologue-ad7f44df-6a2f-4364-866e-df135fb3ccf6.pdf