أَسْتَغْفِرُ اللَّهَ الَّذِي لَا إِلَهَ إِلَّا هُوَ الْحَيُّ الْقَيُّومُ وَأَتُوبُ إِلَيْهِ
Transliteration
Astaghfirullahalladhi la ilaha illa huwal-hayyul-qayyumu wa atubu ilayh
English meaning
I seek forgiveness of Allah, besides whom there is no deity, the Ever-Living, the Self-Subsisting, and I repent to Him.
When is it recited?
Can be recited anytime, especially morning and evening.
Its virtue
Whoever recites this will be forgiven, even if they fled from battle.
Source
Abu Dawud, Witr 26, 1517; Tirmidhi, Da'awat 17, 3577