Verse of purification

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The verse of purification (Arabic:آية التطهير) refers to verse 33:33 of the Quran, the central religious text in Islam. The verse concerns the status of purity of the Ahl al-Bayt (lit. 'people of the house'), the last passage of which reads,

God only desires (innama yuridu llahu) to remove defilement (rijs) from you, O Ahl al-Bayt, and to purify you completely.^[1]

Muslims disagree as to who belongs to the Ahl al-Bayt and what political privileges or responsibilities they have.^[2] Shia Islam limits the Ahl al-Bayt to the Islamic prophet Muhammad, his daughter Fatima, her husband Ali, and their two sons, Hasan and Husayn.^[3][4] There are various views in Sunni Islam, though a typical compromise is to include also Muhammad's wives in the Ahl al-Bayt.^[5] The verse of purification is regarded by the Shia as evidence of the infallibility of the Ahl al-Bayt.^[6]