Amir bin Sad bin Abu Waqqas reported on the authority of his father that he asked Usama bin Zaid: What have you heard from Allahs Messenger ﷺ about plague? Thereupon Usama said: Allahs Messenger ﷺ said: Plague is a calamity which was sent to Bani Israil or upon those who were before you. So when you hear that it has broken out in a land, dont go to it, and when it has broken out in the land where you are, dont run out of it. In the narration transmitted on the authority of Abu Nadr there is a slight variation of wording.