"Falsehood cannot come to it from before it or behind it (it is) sent down by the All-Wise, Worthy of all praise (Allah swt)."
Quran 41.42
Surah Fussillat

"Beshak jin logon ne kufr kiya un par barabar hai ki aap(SAWS) unhe daraye ya na daraye woh imaan nahi layenge.
Allah ne unke dilon par aur unke kaano par muhar lagaa di aur unki aankhon par parda hai aur unke liye bada azaab hai."
Quran 2.6-7