﴿ وَإِذَا قَرَأْتَ ٱلْقُرْءَانَ جَعَلْنَا بَيْنَكَ وَبَيْنَ ٱلَّذِينَ لَا يُؤْمِنُونَ بِٱلْءَاخِرَةِ حِجَابًۭا مَّسْتُورًۭا ﴾

“But [thus it is:] whenever thou recitest the Qur'an, We place an invisible barrier between thee and those who will not believe in the life to come: -”

Please check ayah 17:46 for complete tafsir.