أَسْتَغْفِرُ اللَّهَ الْعَظِيمَ الَّذِي لَا إِلَهَ إِلَّا هُوَ الْحَيُّ الْقَيُّومُ وَأَتُوبُ إِلَيْهِ
Transliteration
Astaghfirullahal-'azimalladhi la ilaha illa huwal-hayyul-qayyumu wa atubu ilayh
English meaning
I seek forgiveness of Allah the Almighty, besides whom there is no deity, the Ever-Living, the Self-Subsisting, and I repent to Him.
When is it recited?
Seeking forgiveness is a means for increase in provision (Surah Nuh).
Its virtue
Allah sends rain in abundance and grants wealth and children to those who seek forgiveness.
Source
Nuh 71:10-12; Abu Dawud, Witr 26, 1517