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
وَأُفَوِّضُ أَمْرِي إِلَى اللَّهِ إِنَّ اللَّهَ بَصِيرٌ بِالْعِبَادِ
And I entrust my affair to Allah. Indeed, Allah is Seeing of His servants.
Sahihحَسْبِيَ 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 إِنِّي عَبْدُكَ ابْنُ عَبْدِكَ ابْنُ أَمَتِكَ نَاصِيَتِي بِيَدِكَ مَاضٍ فِيَّ حُكْمُكَ عَدْلٌ فِيَّ قَضَاؤُكَ أَسْأَلُكَ بِكُلِّ اسْمٍ هُوَ لَكَ سَمَّيْتَ بِهِ نَفْسَكَ أَوْ عَلَّمْتَهُ أَحَدًا مِنْ خَلْقِكَ أَوْ أَنْزَلْتَهُ فِي كِتَابِكَ أَوِ اسْتَأْثَرْتَ بِهِ فِي عِلْمِ الْغَيْبِ عِنْدَكَ أَنْ تَجْعَلَ الْقُرْآنَ رَبِيعَ قَلْبِي وَنُورَ صَدْرِي وَجَلَاءَ حُزْنِي وَذَهَابَ هَمِّي
O Allah, I am Your servant, the son of Your servant, the son of Your maidservant. My forelock is in Your hand. Your command over me is forever executed, and Your decree over me is just. I ask You by every Name belonging to You — which You have named Yourself with, or revealed in Your Book, or taught any of Your creation, or kept in the knowledge of the unseen with You — that You make the Quran the spring of my heart, the light of my chest, the departure of my grief, and the relief of my anxiety.
Sahihاللَّهُمَّ لَا سَهْلَ إِلَّا مَا جَعَلْتَهُ سَهْلًا وَأَنْتَ تَجْعَلُ الْحَزْنَ إِذَا شِئْتَ سَهْلًا
O Allah, nothing is easy except what You make easy, and You can make difficulty easy if You wish.
Sahih