At a loss or affliction

إِنَّا لِلَّهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ، اللَّهُمَّ أْجُرْنِي فِي مُصِيبَتِي وَأَخْلِفْ لِي خَيْرًا مِنْهَا

Inna lillahi wa inna ilayhi raji'un. Allahumma'jurni fi musibati wa akhlif li khayran minha

“Indeed we belong to Allah and to Him we return. O Allah, reward me in my affliction and give me better in its place. (Umm Salamah said it — and was given the Prophet ﷺ.)”

— Sahih Muslim 918