[36] This is referring to the return of the Prophet (ﷺ) to Makkah after emigration to Medina, which did take place eventually as a conquerer.
[37] By making any concessions to their beliefs.
[38] i.e., except Himself. The commentators have two interpretations here: 1. that Allah is Permanent and Eternal, for everything will perish except Himself. 2. that everything will perish except what is done for the sake (Face) of Allah.