لَا إِلَهَ إِلَّا اللَّهُ الْعَظِيمُ الْحَلِيمُ لَا إِلَهَ إِلَّا اللَّهُ رَبُّ الْعَرْشِ الْعَظِيمِ لَا إِلَهَ إِلَّا اللَّهُ رَبُّ السَّمَاوَاتِ وَرَبُّ الْأَرْضِ وَرَبُّ الْعَرْشِ الْكَرِيمِ
“There is no deity except Allah, the Magnificent, the Forbearing. There is no deity except Allah, Lord of the Magnificent Throne. There is no deity except Allah, Lord of the heavens, Lord of the earth, and Lord of the Noble Throne.”
La ilaha illallahul-'Azeemul-Haleem, la ilaha illallahu Rabbul-'Arshil-'Azeem, la ilaha illallahu Rabbus-samawati wa Rabbul-ardi wa Rabbul-'Arshil-Kareem
— Sahih al-Bukhari 6346
When in severe distress or calamity
The Prophet (PBUH) used to say this dua at times of distress and severe difficulty.
حَسْبِيَ اللَّهُ لَا إِلَهَ إِلَّا هُوَ عَلَيْهِ تَوَكَّلْتُ وَهُوَ رَبُّ الْعَرْشِ الْعَظِيمِ
“Sufficient for me is Allah; there is no deity except Him. On Him I have relied, and He is the Lord of the Great Throne.”
Quran 9:129 — At-Tawbah
اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْهَمِّ وَالْحَزَنِ وَالْعَجْزِ وَالْكَسَلِ وَالْبُخْلِ وَالْجُبْنِ وَضَلَعِ الدَّيْنِ وَغَلَبَةِ الرِّجَالِ
“O Allah, I seek refuge in You from worry and grief, from incapacity and laziness, from cowardice and miserliness, from being heavily in debt and from being overpowered by men.”
Sahih al-Bukhari 6369