The Messenger of Allah (ﷺ) used to say when he was in distress:

لَا إِلَهَ إِلَّا اللَّهُ الْعَظِيمُ الْحَلِيمُ، لَا إِلَهَ إِلَّا اللَّهُ رَبُّ الْعَرْشِ الْعَظِيمِ، لَا إِلَهَ إِلَّا اللَّهُ رَبُّ السَّمَوَاتِ، وَرَبُّ الْأَرْضِ، وَرَبُّ الْعَرْشِ الْكَرِيمِ

La ilaha illallahul-Adhimul-Haleem. La ilaha illallahu Rabbul-‘Arshil-‘Adhim. La ilaha illallahu Rabbus-samawati, wa Rabbul-ardi, wa Rabbul-‘Arshil- Kareem

None has the right to be worshipped but Allah the Incomparably Great, the Compassionate. None has the right to be worshipped but Allah the Lord of the Mighty Throne. None has the right to be worshipped but Allah the Lord of the heavens, the Lord of the earth, and the Lord of the Honourable Throne

[Al-Bukhari 6345 and Muslim 2730]