إِنَّا لِلَّهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ
Inna lillahi wa inna ilayhi raji'un
Indeed, to Allah we belong and to Him we shall return.
The istirja' — said upon hearing any bad news, any loss, any calamity. The Quran says those who say this when struck by misfortune "are the ones upon whom are blessings from their Lord and mercy. And it is those who are the rightly guided" (2:157). Two facts that reframe every tragedy: you belong to Allah (so He has the right to take what is His), and you are returning to Him (so this separation is temporary).
Related Du'as
يَا حَيُّ يَا قَيُّومُ بِرَحْمَتِكَ أَسْتَغِيثُ أَصْلِحْ لِي شَأْنِي كُلَّهُ وَلَا تَكِلْنِي إِلَىٰ نَفْسِي طَرْفَةَ عَيْنٍ
O Ever-Living, O Sustainer, by Your mercy I seek help. Set right all my affairs for me, and do not leave me to myself even for the blink of an eye.
Hasanاللَّهُمَّ لَا تَجْعَلْ مُصِيبَتَنَا فِي دِينِنَا وَلَا تَجْعَلِ الدُّنْيَا أَكْبَرَ هَمِّنَا وَلَا مَبْلَغَ عِلْمِنَا
O Allah, do not make our calamity in our religion, and do not make this world our greatest concern or the extent of our knowledge.
Hasanحَسْبِيَ اللَّهُ لَا إِلَٰهَ إِلَّا هُوَ عَلَيْهِ تَوَكَّلْتُ وَهُوَ رَبُّ الْعَرْشِ الْعَظِيمِ
Allah is sufficient for me. There is no deity except Him. Upon Him I rely, and He is the Lord of the Great Throne.
Sahihاللَّهُمَّ اجْعَلْ لِي مِنْ كُلِّ هَمٍّ فَرَجًا وَمِنْ كُلِّ ضِيقٍ مَخْرَجًا وَارْزُقْنِي مِنْ حَيْثُ لَا أَحْتَسِبُ
O Allah, grant me relief from every worry, a way out from every difficulty, and provide for me from where I do not expect.
Hasan