It wasnarrated from Fatimah bint Husain that her father said:
TheProphet(ﷺ) said: "Whoever was stricken with a calamity and when heremembers it he says 'Inna lillahi, wa inna ilayhi raji'un(Truly, toAllah we belong and truly, to Him we shall return),'even though ithappened a long time ago, Allah will record for him areward like thatof the day it befell him."
English reference: Vol. 1, Book 6, Hadith 1600
Arabic reference: Book 6, Hadith 1668