﴿ كَلَّا ۚ سَيَكْفُرُونَ بِعِبَادَتِهِمْ وَيَكُونُونَ عَلَيْهِمْ ضِدًّا ﴾

“But nay! [On Judgment Day] these [very objects of adoration] will disavow the worship that was paid to them, and will turn against those [who had worshipped them]!”

(Nay, but they will deny their worship of them) i.e. the idols will absolve themselves from the disbelievers' worship of them, (and become) i.e. the idols (opponents unto them) a help in the torment of the disbelievers.