so obdurate that, even after punishment, they would be unconvinced. The words   
are:
  Some among them hearken unto thee;1 but we have cast a veil over 
  their hearts that they should not understand it (Qur'an) and a weight into 
  their ears; and though they should see all kinds of signs, they will refuse 
  all faith in them until when they come to thee, to dispute with thee. The 
  infidels say, Verily, this is nothing but fables of the ancients.'
And they will forbid it and depart from it, but they are only the authors of  
their own perdition, and know it not. Suratu'l-An'am (vi) 25-6.
 
Abu Jahl,2 another bitter opponent, is referred to in Suratu'l-'Alaq 
(xcvi) :
 
  Nay, verily, man is insolent,
  Because he seeth himself possessed of riches. 6-7.
It is said by Baidawi, that he threatened to put his foot on the neck of the 
Prophet, when he was prostrate in prayer.
Again in the Suratu'l-Hajj (xxii) we read :
  A man there is who disputeth about God without knowledge or guidance or 
  enlightening Book.
This is a Madina Sura and so the reference is historical and retrospective, 
but that is not uncommon in the later Suras. In another late Madina Sura we 
have: