>>17813220
Pic is a good academic book on this. Basically, it starts with the materials we have including Muhammad ibn Ishaq's sirah and Ibn Kathir and states how the various figures of older prophets was treated literally and as a type of rote historical and legal text. This stuff actually predates a lto of the traditional things we associate with Islamic dogma. This was likley an intentional break from the typological ordering of narratives found in Christian texts like the Alexandrian and Antiochian catecthical schools and a break from Jewish midrash.