اللَّهُمَّ إِنِّي أَسْأَلُكَ يَا أَللَّهُ بِأَنَّكَ الْوَاحِدُ الْأَحَدُ الصَّمَدُ الَّذِي لَمْ يَلِدْ وَلَمْ يولَدْ، وَلَمْ يَكنْ لَهُ كُفُواً أَحَدٌ، أَنْ تَغْفِرَ لِي ذُنُوبِي إِنَّكَ أَنْتَ الْغَفُورُ الرَّحِّيمُ
Allahumma innee as-aluka ya Allah bi-annakal-wahidul-ahadus-samad, allathee lam yalid walam yoolad, walam yakun lahu kufuwan ahad, an taghfira lee thunoobee innaka antal-Ghafoorur-Raheem.
(O Allah, I ask You O Allah, as You are The One, The Only, AS-Samad, The One who begets not, nor was He begotten and there is none like unto Him that You forgive me my sins for verily You are The Oft-Forgiving, Most-Merciful.)(AS-Samad: The Self-Sufficient Master, Possessor of perfect attributes whom all of creation turn to in all their needs.)
Source and references
Source edition: Fortress of the Muslim. Open source ↗