إِنَّ ٱلَّذِينَ يُلْحِدُونَ فِىٓ ءَايَـٰتِنَا لَا يَخْفَوْنَ عَلَيْنَآ ۗ أَفَمَن يُلْقَىٰ فِى ٱلنَّارِ خَيْرٌ أَم مَّن يَأْتِىٓ ءَامِنًا يَوْمَ ٱلْقِيَـٰمَةِ ۚ ٱعْمَلُوا۟ مَا شِئْتُمْ ۖ إِنَّهُۥ بِمَا تَعْمَلُونَ بَصِيرٌ Qur’an Fussilat (41:40)Inna alla th eena yul h idoona fee a y a tin a l a yakhfawna AAalayn a afaman yulq a fee a l nn a ri khayrun am man yatee a minan yawma alqiy a mati iAAmaloo m a shitum innahu bim a taAAmaloona ba s eer un
This refers to the noise the disbelievers used to make when the Quran was recited (see 41:26), or those who twist the meaning of Quranic passages and take them out of context.
Pervert the Truth in Our Signs; either by corrupting the scriptures or turning them to false and selfish uses; or by neglecting the Signs of Allah in nature around them, or silencing His voice in their own conscience. Everything is known to Allah. Why not work for true salvation at the final Judgment?