It is narrated from Najdah bin Nufay' that he said: I asked Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) about the saying of Allah, the Mighty and Majestic: "If you do not go forth, He will punish you with a painful punishment" [Surah al-Tawbah: 39] . He said: "The Messenger of Allah (peace and blessings be upon him) called upon one of the Arab tribes to go forth for jihad, but they were sluggish, so rain was withheld from them, and that was their punishment." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.