Ahlul bait a.s in the Quran

2.Ayat al-Wilaya: "Certainly your Master is Allah and His Messenger and those who believe who eshtablish prayer and give charity while they bow. And who ever takes Allah and His Messenger and those who believe as a guardian, so surely the party of Allah will be victorious." (Quran 5:55-56) It is unanimous that the verse descended about Imam Ali when he gave away in charity his ring while he was in a state of kneeling in his prayer. Many Sunni commentators of the Quran confirm the fact that the above verse descended on the honor of Imam Ali and many Sunni scholars have also mentioned the unanimity or consensus of opinion in their books. Here are some references: Tafsir al-Kabir, by Ahmad Ibn Muhammad al-Tha'labi, under Verse 5:55 Tafsir al-Kabir, by Ibn Jarir al-Tabari, v6, pp 186,288-289 Tafsir Jamiul Hukam al-Quran, by Muhammad Ibn Ahmad Qurtubi, v6, p219 Tafsir al-Khazin, v2, p68 Tafsir al-Durr al-Manthoor, by al-Suyuti, v2, pp 293-294 Tafsir al-Kashshaf, by al-Zamakhshari, Egypt 1373, v1, pp 505,649 Asbab al-Nuzool, by Jalaluddin al-Suyuti, Egypt 1382, v1, p73 Asbab al-Nuzool, by al-Wahidi, on the authority of Ibn Abbas Sharh al-Tjrid, by Allama Qushji Ahkam al-Quran, al-Jassas, v2, pp 542-543 Musnad Ahmad Ibn Hanbal, v5, p38 Kanzul Ummal, by al-Muttaqi al-Hindi, v6, p391, Tradition #5991 al-Awsat, by Tabarani, narrated from Ammar Yasir Ibn Mardawayh, on the authority of Ibn Abbas Allama al-Tabarsi, while commenting on this verse in Majma' al-Bayan states: "The plural form has been used for Ali, Commander of the faithful, in order to express his honor and eminence." And masters of the Arabic language use the plural form for an individual to show respect. Allama al-Zamakshari in his Tafsir al-Kashshaf, v1, p649, has mentioned another nice point which is as follows: If you inquire how this plural word is applicable to Ali, may Allah be gracious to him, who is an individual, I shall say that though this verse is about Ali, an individual, the plural form is used in order to presuade others to act similarly and to give alms as readily as Ali did. There is also an implied instruction that the faithful should keep themselves always on the look out for occasions of acts of sympathy, benevolence and charity to the poor and the needy, and readily do the needful without waiting till the completion of even so important a duty as saying a prayer.