He says...
He says: "Sucn an application is too well known in their language to require proofs." IV Quoting al-Zamakhshari, In his Kashshaf , al-Zamakhshari mentions another nice point when he says: "If you wonder how it can be accurate to use the plural with ‘Ali, may Allah be pleased with him, I will tell you that he is addressed in the plural form, although he is only one man, so that people may follow his example and earn rewards like his, and so that Allah may point out the fact that a believer's attitude should be like ‘Ali's, that is, being eager to do deeds of righteousness and goodwill by looking after the poor, so much so that even the performance of something which does not permit any delay, such as saying the prayers, should not make them postpone it till they are through." V What I have Stated.
I personally have a nice and more precise point. When the Almighty applied the plural rather than the singular form, as many do, then those who hated ‘Ali as well as all those who were envious of and in competition with Banu Hashim would not be able to tolerate hearing it in the singular form, for they would then be unable to hide the truth or water it down. Because of their desperation, they might even do something quite harmful to Islam.
It is quite possible that it was for this reason that the verse was revealed in the plural form though applied to the singular: in order to avoid the harm resulting from disgracing those folks. The verses after that particular one vary in form and status, gradually preparing them for wilayat , till Allah perfected His religion and completed His blessing, as was his usual habit, peace be upon him and his progeny, and that of the wise in attaining what otherwise is quite difficult to attain.
Had the verse come in the singular form, those folks would have then put their fingers in their ears, covered themselves with their own clothes and become stubborn, arrogant, and naughty. This is a sublime wisdom manifested in all the verses of the Holy Qur'an which were revealed to highlight the attributes of the Commander of the Faithful and those among his purified household, as is quite obvious.
We have explained these statements and brought irrefutable proofs and obvious testimonies in our books Sabil al-Muminin and Tanzil al-Ayat , and praise be to Allah for His Guidance and Support, Wassalam. Sincerely, Sh Previous…