﴿ ٱلَّذِينَ كَانَتْ أَعْيُنُهُمْ فِى غِطَآءٍ عَن ذِكْرِى وَكَانُوا۟ لَا يَسْتَطِيعُونَ سَمْعًا ﴾

“those whose eyes had been veiled against any remembrance of Me because they could not bear to listen [to the voice of truth]!”

those disbelievers whose eyes alladhīna kānat a‘yunuhum substitutes for al-kāfirīna ‘the disbelievers’ were masked from My remembrance namely the Qur’ān such that they were blind unable to be guided thereby and who could not bear to hear that is to say they were unable to listen to what the Prophet used to recite to them out of spite for him and so they did not believe therein.