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Forgiveness

Seeking forgiveness

أَسْتَغْفِرُ اللَّهَ الْعَظِيمَ وَأَتُوبُ إِلَيْهِ

Astaghfirullahal-‘azima wa atubu ilayh

I seek the forgiveness of Allah the Magnificent, and I turn to Him in repentance.

Source
Sunan at-Tirmidhi
When it is said
Said at any time.

Other duas for forgiveness