It is mentioned in the Holy Qur'an: "Give glad tidings to those who patiently endure, who say when afflicted with a calamity: "To Allah we belong and to Him we return." They are those on whom (descend) blessings and mercy from their Lord, and they are the ones who receive guidance." (Qur'an Surah Baqarah; 2:155-157) الله يرحمك يا ست الكل