Najdah bin Nufai’ said “I asked Ibn ‘Abbas about the verse. “Unless you go forth, He will punish you with a grievous penalty.” He replied “The rain stopped from them. This was their punishment.”
عَنْ هَذِهِ الآيَةِ { إِلاَّ تَنْفِرُوا يُعَذِّبْكُمْ عَذَابًا أَلِيمًا } قَالَ فَأُمْسِكَ عَنْهُمُ الْمَطَرُ وَكَانَ عَذَابَهُمْ
[Machine] From the saying of Allah Almighty: "Unless you march forth, He will punish you with a painful torment." [Surah At-Tawbah 9:39], he said: "The Messenger of Allah ﷺ wanted to dispatch an army from the living Arabs to fight, but they hesitated. As a result, Allah prevented the rain from falling on them, and that became a punishment for them."
عَنْ قَوْلِ اللَّهِ ﷻ {إِلَّا تَنْفِرُوا} [التوبة 39] يُعَذِّبْكُمْ عَذَابًا أَلِيمًا قَالَ «اسْتَنْفَرَ رَسُولُ اللَّهِ ﷺ حَيًّا مِنْ أَحْيَاءِ الْعَرَبِ فَتَثَاقَلُوا فَأُمْسِكَ عَنْهُمُ الْمَطَرُ وَكَانَ عَذَابُهُمْ»