Prayer (Kitab Al-Salat): Details of Commencing Prayer

Dawud :: Book 3 : Hadith 1193

Narrated Ibn Abbas:

Ikrimah said: Ibn Abbas was informed that so-and-so, a certain wife of the Prophet (peace_be_upon_him), had died. He fell down prostrating himself. He was questioned: Why do you prostrate yourself this moment? He said: The Apostle of Allah (peace_be_upon_him) 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 (peace_be_upon_him).