There is none that can avert it.
indicating that when Allah decides to send the torment upon them, none can prevent it or stop it from striking them.
Al-Hafiz Abu Bakr Ibn Abi Ad-Dunya recorded that Jafar bin Zayd Al-`Abdi said,
"One night, in Al-Madinah, Umar went out investigating the welfare of Muslims and passed by the house of a man who was standing in voluntary prayer. Umar stood quietly, listening to his recitation; the man was reciting,
وَالطُّورِ
(By At-Tur), until he reached the Ayah,
إِنَّ عَذَابَ رَبِّكَ لَوَاقِعٌ
-
مَا لَهُ مِن دَافِعٍ
- (Verily, the torment of your Lord will surely come to pass. There is none that can avert it). Umar said, `By the Lord of the Ka`bah, this is a true vow.' Umar dismounted his donkey and sat next to a wall for a while. He then went back to his house and fell ill for a month. During his illness, the people would visit him, not knowing what caused his illness."
May Allah be pleased with Umar.
Describing the Day of Torment, the Day of Resurrection
Allah said;
يَوْمَ تَمُورُ السَّمَاء مَوْرًا