(Mu'amin) 40 : 33
يَوْمَ تُوَلُّونَ مُدْبِرِينَ مَا لَكُمْ مِنَ اللَّهِ مِنْ عَاصِمٍ ۗ وَمَنْ يُضْلِلِ اللَّهُ فَمَا لَهُ مِنْ هَادٍ
The Day you will turn back and flee, you will not have anyone as helper from Allah; and the one whom Allah allows to stray, then there is none to guide him.
See explanation 11: 43; 30: 33-34; 39: 36-37.