Analysis of information sources in references of the Wikipedia article "Osman's Dream" in English language version.
Apart from these chronicles, there are later sources that begin to establish Osman as a mythic figure. From the 16th century onward a number of dynastic myths are used by Ottoman and Western authors, endowing the founder of the dynasty with more exalted origins. Among these is recounted the famous "dream of Osman" which is supposed to have taken place while he was a guest in the house of a Sheikh, Edebali. [...] This highly symbolic narrative should be understood, however, as an example of eschatological mythology required by the subsequent success of the Ottoman emirate to surround the founder of the dynasty with supernatural vision, providential success, and an illustrious genealogy.
The attraction of Aşıkpasazade's story was not only that it furnished an episode proving that God had bestowed rulership on the Ottomans, but also that it provided, side by side with the physical descent from Oguz Khan, a spiritual descent. [...] Hence the physical union of Osman with a saint's daughter gave the dynasty a spiritual legitimacy and became, after the 1480s, an integral feature of dynastic mythology.
