Who says he wasn't talking about the Written Torah? Jesus never wrote a single word of God down. Jesus taught. That's what was important to him, not books or words.
At that time, the only written word that was the Word of God was the Old Testament, which Jesus quoted frequently, and even used to show others that He was, indeed, the Messiah that was foretold.
Jesus never wrote a single word of God down.
Not that we know of, true.
Jesus taught. That's what was important to him, not books or words.
Yes, Jesus taught, but also viewed the written word as important, as has been shown.