Al-Hasan said: He means, "I know from Allah that He will destroy you and punish you if you do not believe."
قَالَ الْحَسَنُ: يَقُولُ: أَعْلَمُ مِنَ اللَّهِ أَنَّهُ مُهْلِكُكُمْ وَمُعَذِّبُكُمْ؛ إِنْ لم تؤمنوا.
