Intercession in Quran:
Anyone knows the meaning of intercession ?
Allah - there is no deity except Him, the Ever-Living, the Sustainer of [all] existence. Neither drowsiness overtakes Him nor sleep. To Him belongs whatever is in the heavens and whatever is on the earth. Who is it that can intercede with Him except by His permission? He knows what is [presently] before them and what will be after them, and they encompass not a thing of His knowledge except for what He wills. His Kursi extends over the heavens and the earth, and their preservation tires Him not. And He is the Most High, the Most Great [2:255]
Notice the word "except" in the above mentioned verse. This verse does not condemn the presence of an intercessor; they just put a condition for the fact of intercession.
That Day, no intercession will benefit except one to whom the Most Merciful has given permission and has accepted his word [20:109]
And intercession does not benefit with Him except for one whom He permits. [And those wait] until, when terror is removed from their hearts, they will say [to one another], "What has your Lord said?" They will say, "The truth." And He is the Most High, the Grand [34:23]
And how many angels there are in the heavens whose intercession will not avail at all except after Allah has permitted to whom He wills and approves [53:26]
He knows what is before them, and what is behind them, and they cannot intercede except for him with whom He is pleased. And they stand in awe for fear of Him [21:28]
And those whom they invoke instead of Him have no power of intercession; except those who bear witness to the truth and they know [43:86]
And We did not send any messenger except to be obeyed by permission of Allah. And if, when they wronged themselves, they had come to you, [O Muhammad], and asked forgiveness of Allah and the Messenger had asked forgiveness for them, they would have found Allah Accepting of repentance and Merciful [4:64]