عَنْ أُمِّ سَلَمَةَ رَضِيَ اللَّهُ عَنْهَا أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ كَانَ يَقُولُ رَبَّنَا اغْفِرْ لِي وَارْحَمْنِي وَاهْدِنِي لِلطَّرِيقِ الْأَقْوَمِ وَفِي لَفْظٍ رَبِّ اغْفِرْ وَارْحَمْ وَاهْدِنِي السَّبِيلَ الْأَقْوَمَ
It is narrated from Sayyida Umm Salama (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) used to supplicate: O our Lord! Forgive me, have mercy on me, and guide me to the straightest path. In another narration, the words are: O my Lord! Forgive, have mercy, and guide me to the straightest path.