Ahl al-Kisa' (Arabic: أهل الكساء, translit. Ahl al-Kisā'), or the People of the Cloak, refers to the Islamic prophet, Muhammad; his daughter, Fatimah; his cousin and son-in-law Ali; and his two grandsons Hassan and Husayn.
They are also referred to as Aal al-Aba (Arabic: آل العبا, translit. Āl al-‘Abā) and in Farsi as Panj-tan Aal-e Aba (Persian: پنج تن آل عبا, translit.: Panj-tan-e Āl-e Abā) or simply Panj-tan (Persian: پنج تن), meaning the The Five. The origin of this belief is found in the Hadith of the Event of the Cloak and the Hadith of Mubahala. This hadith is graded authentic by Shia Muslims and Sunnis, however many Sunnis plead a different interpretation.
It is one of the foundations of the Shia conception of the Imamah, which states that patrilineal descendants of Muhammad's daughter have a special divine spiritual leadership over the Muslim community. The Ahl al-Kisa, along with their descendants, the Imams, form the Shia definition of Ahl al-Bayt, the "People of the House," or the family of Muhammad.