Al-Isra' - 17:45

وَإِذَا قَرَأْتَ الْقُرآنَ جَعَلْنَا بَيْنَكَ وَبَيْنَ الَّذِينَ لاَ يُؤْمِنُونَ بِالآخِرَةِ حِجَابًا مَّسْتُورًا
[17:45]
And when you recite the Quran, We place between you and those who do not believe in the hereafter a hidden barrier;
When thou dost recite the Qur'an, We put, between thee and those who believe not in the Hereafter, a veil invisible:
And when thou recitest the Qur'an we place between thee and those who believe not in the Hereafter a hidden barrier;