There is no god but You, glory be to You. Indeed, I have been among the wrongdoe — Distress & Anxiety
لَا إِلَهَ إِلَّا أَنْتَ سُبْحَانَكَ إِنِّي كُنْتُ مِنَ الظَّالِمِينَ
Transliteration: Laa ilaaha illaa anta subhaanaka innee kuntu minadh-dhaalimeen
Translation: There is no god but You, glory be to You. Indeed, I have been among the wrongdoers. (Du'a of Yunus — answered immediately)
Reference: Quran 21:87, Tirmidhi 5:529