((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)).
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.)
An-Nasa'i 3/52, Ahmad 4/338. See also Al-Albani, Sahih An-Nasa'i 1/280 and Sifat Salatun-Nabi, pg. 204.