Zikr when calamity befalls

ٱلَّذِينَ إِذَآ أَصَٰبَتْهُم مُّصِيبَةٌۭ قَالُوٓا۟ إِنَّا لِلَّهِ وَإِنَّآ إِلَيْهِ رَٰجِعُونَ

Who say, when afflicted with calamity: "To Allah We belong, and to Him is our return":-

ٱلَّذِينَ قَالَ لَهُمُ ٱلنَّاسُ إِنَّ ٱلنَّاسَ قَدْ جَمَعُوا۟ لَكُمْ فَٱخْشَوْهُمْ فَزَادَهُمْ إِيمَٰنًۭا وَقَالُوا۟ حَسْبُنَا ٱللَّهُ وَنِعْمَ ٱلْوَكِيلُ

Men said to them: "A great army is gathering against you": And frightened them: But it (only) increased their Faith: They said: "For us Allah sufficeth, and He is the best disposer of affairs."

قَالَ رَبِّ ٱشْرَحْ لِى صَدْرِى

(Moses) said: "O my Lord! expand me my breast;

وَيَسِّرْ لِىٓ أَمْرِى

"Ease my task for me;

كَىْ نُسَبِّحَكَ كَثِيرًۭا

"That we may celebrate Thy praise without stint,

وَنَذْكُرَكَ كَثِيرًا

"And remember Thee without stint: