Sura 9 At-Tawbah (The Repentance), aya 115

1. وَمَا كَانَ اللَّهُ لِيُضِلَّ قَوْمًا بَعْدَ إِذْ هَدَاهُمْ حَتَّىٰ يُبَيِّنَ لَهُمْ مَا يَتَّقُونَ ۚ إِنَّ اللَّهَ بِكُلِّ شَيْءٍ عَلِيمٌ

   And Allah would not let a people stray after He has guided them until He makes clear to them what they should avoid. Indeed, Allah is Knowing of all things.

   9:115

Tafsiri: Saheeh International