لَهُ مُعَقِّبَاتٌ مِّن بَيْنِ يَدَيْهِ وَمِنْ خَلْفِهِ يَحْفَظُونَهُ مِنْ أَمْرِ اللَّهِ ۗ إِنَّ اللَّهَ لَا يُغَيِّرُ مَا بِقَوْمٍ حَتَّىٰ يُغَيِّرُوا مَا بِأَنفُسِهِمْ ۗ وَإِذَا أَرَادَ اللَّهُ بِقَوْمٍ سُوءًا فَلَا مَرَدَّ لَهُ ۚ وَمَا لَهُم مِّن دُونِهِ مِن وَالٍ
“For each one there are successive angels before and behind, protecting them by Allah's command. Indeed, Allah would never change a people's state [of favor] until they change their own state [of faith]. And if it is Allah's Will to torment a people, it can never be averted, nor can they find a protector other than Him.”
It is said (hedged in the lecture as "it is said") that this passage refers to Arbad ibn Qays' death by lightning.