اللَّهُمَّ رَحْمَتَكَ أَرْجُو فَلَا تَكِلْنِي إِلَى نَفْسِي طَرْفَةَ عَيْنٍ وَأَصْلِحْ لِي شَأْنِي كُلَّهُ لَا إِلَهَ إِلَّا أَنْتَ
Transliteration
Allahumma rahmataka arju fa la takilni ila nafsi tarfata 'aynin wa aslih li sha'ni kullahu la ilaha illa anta
English meaning
O Allah, it is Your mercy that I hope for, so do not leave me in charge of my affairs even for a blink of an eye, and rectify all my affairs. None has the right to be worshipped except You.
When is it recited?
Recited during times of distress and grief.
Source
Abu Dawud, Adab 101, 5090