Ikrimah said:Ibn Abbas was informed that so-and-so, a certain wife of the Prophet (ﷺ), had died. He fell down prostrating himself. He was questioned: Why do you prostrate yourself this moment? He said: The Messenger of Allah (ﷺ) said: When you see a portent (an accident), prostrate yourselves. And which portent (accident) can be greater than the death of a wife of the Prophet (ﷺ)

English translation · Sunan Abu Dawud