Amir bin Sad reported that a person asked Sad bin Abu Waqqas about the plague, whereupon Usama bin Zaid said: I would inform you about it. The Messenger of Allah ﷺ said: It is a calamity or a disease which Allah sent to a group of Bani Israil, or to the people who were before you; so when you hear of it in land, dont enter it and when it has broken out in your land, dont run away from it.