Narrated to me Abu al-Tahir, Ahmad ibn 'Amr, and Harmalah ibn Yahya, who said: informed us Ibn Wahb, who said: informed me Yunus, from Ibn Shihab, who said: informed me 'Amir ibn Sa'd, from Usamah ibn Zayd, from the Messenger of Allah, peace and blessings be upon him, that he said: "Indeed this pain—or this illness—is a punishment with which some of the nations before you were afflicted, then it remained thereafter on the earth, going away at times and returning at others. So whoever hears of it in a land, let him not enter upon it, and whoever is in a land where it occurs, let him not flee from it."