Hadith remembers God unceasingly. (Al-Ahzab 33: 21) The hadith literature is based on spoken reports in circulation after the death of Muhammad. Unlike the Qur'an, ahadith were not promptly written down during Muhammad's life or immediately after his death. Hadith were evaluated and gathered into large collections during the 8th and 9th centuries, generations after the death of Muhammad, after the end of the era of the "rightful" Rashidun Caliphate, over from where Muhammad lived. "Many thousands of times" more numerous than Quranic verse, ahadith have been described as resembling layers surrounding the “core” of the Islamic belief (the Quran). Well-known,
Hadith Bayad wa Riyad Hadith Bayad wa Riyad Hadith Bayāḍ wa Riyāḍ (, "The Narrative of Bayad and Riyad") is a 13th-century Arabic love story. The main characters of the tale are Bayad, a merchant's son and a foreigner from Damascus, Riyad, a well-educated girl in the court of an unnamed Hajib (vizier or minister) of 'Iraq (Mesopotamia) and a "Lady" (al-sayyida). The "Hadith Bayad wa Riyad" manuscript is believed to be the only illustrated manuscript known to have survived from the more than eight centuries of Muslim medieval life in Spain and Portugal. The sole manuscript is in the Vatican Library, where it