Modern Talmudic Judaism claims 613 mitzvouth (commandments) in the Torah (1st 5 books of the Bible).If your contention (and Hank’s) is merely that Abraham had some sort of written records, there isn’t much (if any) dispute about that. My understanding of Hank’s question had to do with a written law of God’s commands, not a genealogy or history. Again, please forgive me if I am misunderstanding something here.
I certainly didn't mean that.
But prehaps he had some writtings preserved from the families of Seth or other believers in Elohim which had some "guideleines" as to sacrifices, tithing and other elements of "Torah" which became included by the Spirit (but not because they were written down by believers) in the later codified and inspired portion of the Word of God called the Torah humanly authored by Moses.
No doubt the Spirit of God was with Abraham and perhaps even in him on occasion (I don't know) so he knew "intuitively" many things about God and had a heart to obey and please Him.
Also God calls him a prophet (nabee) in Genesis 20:7.
This is the first time the Hebrew word "prophet" (nabee) is used of a man.
Although Noah is called "a preacher of righteousness" in 2 Peter 2:5.
HankD