إِنَّا لِلَّهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ اللَّهُمَّ أَجِرْنِي فِي مُصِيبَتِي وَاخْلُفْ لِي خَيْرَاً مِنْهَا
Definitely, we are from Allah, and to Him is our return. O Allah, grant reward in my calamity and grant in its place a good substitute.
(Muslim)