Surah Al-Isra 17:45

وَإِذَا قَرَأْتَ ٱلْقُرْءَانَ جَعَلْنَا بَيْنَكَ وَبَيْنَ ٱلَّذِينَ لَا يُؤْمِنُونَ بِٱلْـَٔاخِرَةِ حِجَابًا مَّسْتُورًا

And when you recite the Qur’ān, We put between you and those who do not believe in the Hereafter a concealed partition.

Translation: Saheeh International

Tafsir

And when you recite the Qur’ān We place between you and those who do not believe in the Hereafter a hidden barrier that is one that hides you from them so that they cannot see you — this was revealed regarding those who wanted to assassinate him s the Prophet.

Excerpt from Tafsir al-Jalalayn, commentary on 17:45, via Quran.com. The reader has the full commentary and 9 more tafsirs.