In some verses of the Holy Koran, terms called “restriction words” have been used. “Innama”, i.e. one of these restriction words, has been exploited in the verse known as “tat’hir” (i.e. sanctify). Most of Sunni commentators neglect this word and its indication of restriction. Although, some commentators have noticed that the word “Innama” indicates restriction in this verse, they failed in verifying what sort of an indication it is. Some have said this verse refers only to the wives of the prophet, while others include the prophet’s daughter and her husband and sons (known as “Ale Aba”) as well, and some have also added Abd al Motalleb’s children to the people mentioned above. This problem roots in overlooking the story behind this verse beside the real meaning and use of the word “Innama”. In contrast, Shiite commentators have mostly considered the real meaning of the word “Innama” and the narrative of why and when the verse has come to the prophet, altogether. Consequently, they identify “Ale Aba” and the twelve Imams as the true meaning of the phrase “AhleBeit” (i.e. the household).