The Prophet used to say at the time of difficulty:
'La ilaha il-lallah Al-'Alimul-Halim.
La-ilaha il-lallah Rabul- Arsh-al-Azim,
La ilaha-il-lallah Rabus-Samawati Rab-ul-Ard;
wa Rab-ul-Arsh Al-Karim.'
Translation:
"None has the right to be worshipped but Allah, the Majestic, the Most Forbearing.
None has the right to be worshipped but Allah, the Lord of the Tremendous Throne.
None has the right to be worshipped but Allah, the Lord of the Heavens and the Lord of the Honourable Throne.
I believe.
Subanallah.