لَا إِلَهَ إِلَّا اللَّهُ، الْعَظِيْمُ الْحَلِيْمُ لَا إِلَهَ إِلَّا اللَّهُ، رَبُّ الْعَرْشِ الْعَظِيْمِ لَا إِلَهَ إِلَّا اللَّهُ، رَبُّ السَّمَاوَاتِ، وَرَبُّ الْأَرْضِ، وَرَبُّ الْعَرْشِ الْكَرِيْمِ

Laa 'ilaaha 'illAllaahul-'Adheemul-Haleem, laa 'ilaaha 'illAllaahu Rabbul-'Arshil-'Adheem, laa 'ilaaha 'illAllaahu Rabbus-samaawaati wa Rabbul-'ardi wa Rabbul-'Arshil-Kareem

There is none worthy of worship but Allah the Mighty, the Forbearing. There is none worthy of worship but Allah, Lord of the Magnificent Throne. There is none worthy of worship but Allah, Lord of the heavens and Lord of the earth, and Lord of the Noble Throne. The Prophet (ﷺ) used to invoke Allah at the time of distress, saying, (the dua is mentioned above). [1] Ali (RA) said, The Messenger of Allah taught me this above mentioned dua in the state of anxiety and distress. [2]

Reference: [1] Bukhari: 6346 [2] Sahih Ibn Hibban 3/147, Musnad Ahmad 194