Medieval Europe’s favorite Muhammad story was the Zaynab marriage scandal

Evidence

Probably the favourite mediaeval story of Muhammad was that of his marriage to Zaynab bint Jahsh after her divorce from Zayd ibn Haritha. The story has popular appeal of a police-court character, if told with the imputation of police-court motives, as it always was: the all but incestuous adultery with the wife of an adopted son; Muhammad’s inability to resist fleshly temptation; the use of a special revelation to justify what he had done. The story was told so often that no attempt can be made here to trace its literary history. — Norman Daniel, Islam and the West, 557