One of the most important hadiths regarding the Ahl al-Bayt (as) is the hadith of Kisa. The Hadith of Kisa is the hadith that sets up the Ahl al-Bayt (as) as the foundational and infallible guides of Islam.  The hadith mentions the divine role of the 5 holy ones, namely the Prophet, Imam Ali, Fatima, Imam Hasan and Imam Husayn. The 5 are mentioned as they were the only ones who were living at the time and were the ones who came under the cloak.

 In the hadith of Kisa, the Prophet (s) makes it clear that his wives are not part of it. He makes it clear that the people of Kisa are purified, infallible and are the guides of mankind and that true faith in Islam cannot be attained without holding them are role models and guides.