It is narrated from Sayyiduna Imam Hussain (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whenever any Muslim man or woman is afflicted with a calamity—even if a long time has passed since it occurred—and whenever it comes to mind, he or she says «إِنَّا لِلّٰهِ وَإِنَّا إِلَيْهِ رَاجِعُوْنَ», then Allah Almighty will grant him or her the same reward as He granted on the day the calamity befell."