this topic belongs to ahlul bait, not ahlul muhabila, start new therad will answer there.
*producing below ayah-e-thateer, allah says to mothers of ummah that you are not like other women since you have very special position. *
“O wives of the Prophet! You are not like any other of the women; If you will be on your guard, then be not soft in your speech, lest he in whose heart is a disease yearn; and speak a good word. And stay quietly in your houses, and make not a dazzling display, like that of the former Times of Ignorance; and establish regular Prayer, and give regular Charity; and obey Allah and His Messenger. And Allah only wishes to remove all abomination from you, you Ahlel Bayt (People of the House), and to make you pure and spotless. And recite what is rehearsed to you in your homes, of the Signs of Allah and His Wisdom: for Allah understands the finest mysteries and is well-acquainted (with them).” (Quran, 33:32-34)
Allah Almighty clearly addresses the wives of the Prophet (صلّى الله عليه وآله وسلّم). If we were to argue that this verse is the verse of purification and that it makes certain people infallible, then we would have to conclude that it is Aisha (رضّى الله عنها) and the rest of the Prophet’s wives which were made infallible. We base this on the simple fact that the verse was revealed with the heading “O wives of the Prophet.” how can we say that this verse refers to Ali (رضّى الله عنه) and the so called Infallible Imams when none of them are mentioned here, but only the wives are addressed? We understand that it is a popular concept that this verse makes the Ahlel Bayt infallible. However, it is also the same people who spread such conceptions who believe that Aisha (رضّى الله عنها) hated Ali (رضّى الله عنه). It seems to us that, if anything, it is Aisha (رضّى الله عنها) who is made infallible, and if indeed that is the case shouldn’t the Shia side with her over Ali (رضّى الله عنه)?
There is actually not a single verse in the Quran which identifies Ali (رضّى الله عنه), Fatima (رضّى الله عنها), Hasan (رضّى الله عنه), or Hussain (رضّى الله عنه) to be Ahlel Bayt. Not a single verse in the Quran mentions the so called 12 Infallible Imams of the Shia religion, let alone mentioning them as the Ahlel Bayt. Nowhere in the Quran does it refer to the Hidden Imam as the Ahlel Bayt. How is it then that a very fundamental aspect of the Shia faith is not in the Quran, which is supposed to be the ultimate guide to truth? How can the ultimate guide be devoid of the essence of belief, as the Shia claim that following their Ahlel Bayt is? The term Ahlel Bayt has been used twice in the Quran, and both times to refer to the wives. The Quran does not say “O cousin of the Prophet” but rather it says “O wives of the Prophet.”
In conclusion, the verse you have mentioned, Verse 33:33, was addressed to the Prophet’s wives.