إِنَّا لِلَّهِ وَإِنَّا إِلَيْهِ رَاجِعُوْنَ، اَللَّهُمَّ عِنْدَكَ أَحْتَسِبُ مُصِيْبَتِيْ فَأْجُرْنِيْ فِيْهَا وَأَبْدِلْنِيْ مِنْهَا خَيْرًا.

Inna lillaahi wa inna ilayhi raaji`un, Allaahumma `indaka ahtasibu musibati fa’jurni fihaa wa abdilni minhaa khair.

Indeed, to Allah we belong and to Him we shall return. O Allah, I seek reward with You for my affliction, so reward me for it, and replace it for me with something better.

Reference: Sahih. Tirmidhi: 3511