Abdullah ibn Maslamah ibn Qa'nab and Qutaybah ibn Sa'id narrated to us, both saying: Al-Mughirah informed us — and Ibn Qa'nab attributed him, saying: Ibn Abd al-Rahman al-Qurashi — from Abu al-Nadr, from Amir ibn Sa'd ibn Abi Waqqas, from Usamah ibn Zayd, who said: The Messenger of Allah, peace and blessings be upon him, said: "The plague is a sign of punishment with which Allah, Mighty and Majestic, afflicts some of His servants. So when you hear of it in a land, do not enter it, and when it occurs in a land while you are in it, do not flee from it." This is the hadith of al-Qa'nabi, and Qutaybah's version is similar.