﴿ يَوْمَ تُوَلُّونَ مُدْبِرِينَ مَا لَكُم مِّنَ ٱللَّهِ مِنْ عَاصِمٍۢ ۗ وَمَن يُضْلِلِ ٱللَّهُ فَمَا لَهُۥ مِنْ هَادٍۢ ﴾

“the Day when you will [wish to] turn your backs and flee, having none to defend you against God: for he whom God lets go astray can never find any guide.”

a day when you will turn back to flee from the site of the Reckoning leading to the Fire not having anyone to defend you to protect you from God in other words from His chastisement and whomever God leads astray for him there is no guide.