The verses significance stems from Muhammad's usage of the phrase "Ahl al-Bayt" meaning "people of the house" in the second part of the verse. The interpretation of "Ahl al-Bayt" establishes a critical difference between Sunnis and Shi'ites. Shi'ites believe the term refers strictly to Muhammad, Fatima, Ali, Hasan and Husayn implying they are only members of "Ahl al-Bayt". Under this dogma, only Muhammad's direct lineage holds a spiritual leadership and governorship over the Muslim community. In contrast, the Sunnis believe Muhammad was not referring solely to the five people in the room. Instead, Sunnis hold any muslim of good faith can attain spiritual leadership and governorship. The discrepancy between the two interpretations stems from Umm Salama's narration of the verse of purification and Hadith of Cloak.