Yahya related to me from Malik from Abd ar-Rahman ibn al-Qasimibn Muhammad ibn Abi Bakr that the Messenger of Allah, may Allah blesshim and grant him peace, said, "Let the misfortune that befalls me bea comfort to the Muslims in their misfortunes."
USC-MSA web (English) reference: Book 16, Hadith 41
Arabic reference: Book 16, Hadith 563