Surah Al-Qasas (The Stories), Verse 86

وَمَا كُنْتَ تَرْجُوْۤا اَنْ یُّلْقٰۤی اِلَیْكَ الْكِتٰبُ اِلَّا رَحْمَةً مِّنْ رَّبِّكَ فَلَا تَكُوْنَنَّ ظَهِیْرًا لِّلْكٰفِرِیْنَ 

Wa maa kunta tarjooo ai yulqaaa ilaikal Kitaabu illaa rahmatan mir Rabbika falaa takoonanna zaheeral lil kaafireen

“And thou hadst not expected that the Book would be sent to thee except as a Mercy from thy Lord: Therefore lend not thou support in any way to those who reject (Allah's Message).”

Quran 28:86 (Yusuf Ali Translation)