THE POSSIBILITY OF intercession for the sinners on the Day of Judgment is quite obvious from the repeated declarations of the Holy Qur'an. The declarations are so clearly worded that none can misinterpret them otherwise:-
According to this verse, intercession is possible only with permission of the Lord. There are the following verses clearer still :
The above verses are too clear to create any doubt against some dear ones to the Lord having the authority from Him to intercede. Who else could be more entitled to this divine grace and unique privilege than the apostles of God, more particularly the Last one, the chief of them, and those who have surrendered their lives in the way of the Lord like Husain and his faithful comrades who were martyred along with him. The point is that to one who sincerely seeks to know the truth, a straight answer, with the simplest logic, will certainly suffice, but to one who wants to go on arguing merely for argument's sake, even the apostles from God could not satisfy. No amount of arguing will be of any avail when the understanding is never to come at all from within the enquirer. One can give an argument but never an understanding.
Adapted from the book: "Husain; The Saviour of Islam" by: "S.V. Mir Ahmed Ali"