Quran 28:16 from Surah Al-Qasas on Divine Marvels.
قَالَ رَبِّ إِنِّي ظَلَمۡتُ نَفۡسِي فَٱغۡفِرۡ لِي فَغَفَرَ لَهُۥٓۚ إِنَّهُۥ هُوَ ٱلۡغَفُورُ ٱلرَّحِيمُ
English translation: He said My Lord! Indeed I [I] have wronged my soul so forgive [for] me Then He forgave [for] him Indeed He He (is) the Oft-Forgiving the Most Merciful
Transliteration: qala rabbi inni zalamtu nafsi fa-igh'fir li faghafara lahu innahu huwa al-ghafuru al-rahimu