As a matter of fact, the whole story about Moses seems to be fiction! There's no independent evidence that he ever existed, no evidence that there were ever Jews enslaved in Egypt, at least not in the vast numbers portrayed in the Bible, no evidence of a Hebrew Exodus, no evidence of millions of people spending 40 years in Sinai. Last I heard, even some Jewish scholars now doubt that Moses, even if he existed, ever wrote the first five books of the Bible, as has been traditionally believed. It's all myths and story telling, teaching tools for uneducated people. Aside from some of the more arcane dietary and clothing laws of the Bible, there is nothing in there that wasn't common in most of the earlier cultures around the world at the time. The Hebrews/Jews just adopted those that worked for them, changed those that needed to be changed to agree with their own beliefs, then wrote it up as if they invented it.