Affirmation of the indepency of Tatheer verse in Quran

One of the especially exclusivity of Shia is to defend and prove his belief that is Imamat and Ismat on the basis of Quran teachings and Prophet Mohammad, s determined Hadiths. True understanding of Quran verses and their position among other verses is very significant in quranic pure interpretation and this point is an useful way in interpretation in Quran verses. The verse of Tatheer (purification) and its implication in many aspects and its position between other verses is subjected to many discussions and debates among Muslim scholars. This discussion has caused different works around it. The aim in this paper is to deal with verse number 33 from Sorah Al-Ahzab. The research question is: what evidences are there for considering verse of Tatheer (Purification) as a independent verse. In this way at the first step the evidences of independency of Tatheer verse is presented, then critic the reasons presented by Sunni scholars.