yes, however moral rules do not come from God, they come from humans, and they tend to evolve over time, not suddenly spring into existence. The rules in the old testament are 100% not new to the people who adhered to them. If we look at more recent religions, like say Islam, we see that the pilgrimages, fasting, the Kaaba and the term Allah for God all existed before the Quran. The same is true of the rules in the Bible and the Torah, so I guess you could say the rules are prescriptive but writing them down is not. https://youtu.be/Wd6FgYbMffk?si=eDtI1s6f3wHnClSh