لَا إِلَٰهَ إِلَّا أَنْتَ سُبْحَانَكَ إِنِّي كُنْتُ مِنَ الظَّالِمِينَ
La ilaha illa anta subhanaka inni kuntu minaz-zalimin
There is no deity but You. Glory be to You. Indeed, I have been among the wrongdoers.
Recite during distress, anxiety, or any difficulty
The Prophet (PBUH) said: 'No Muslim ever calls upon Allah with it for anything but Allah responds to him.'