Surah 17:45
"When you recite the Qur’ān, We place between you and those who do not believe in the Hereafter an obscuring veil."
17.45 – When you recite the Qur’ān
These words begin a passage of controversy or polemic (vv. 45–57) in which the objections of the listeners are apparently recorded, along with the responses of the messenger (“Say!”).
- from The Quran with Christian Commentary: A Guide to Understanding the Scripture of Islam