Sahih Ibn Khuzaymah

It is narrated from Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings of Allah be upon him) finished his prayer, he would say salam, then recite this supplication, « اللَّهُمَّ اغْفِرْ لِي مَا قَدَّمْتُ وَمَا أَخَّرْتُ وَمَا أَسْرَرْتُ وَمَا أَعْلَنْتُ وَمَا أَسْرَفْتُ وَمَا أَنْتَ أَعْلَمُ بِهِ مِنِّي أَنْتَ الْمُقَدِّمُ وَأَنْتَ الْمُؤَخِّرُ لاَ إِلَهَ إِلاَّ أَنْتَ » "O Allah, forgive my earlier and later sins, my hidden and open sins, and whatever wrong I have done to myself, and the sins which You know better than I do. You are the Advancer and the Delayer. There is no true deity except You." In the narration of Abu Salih, it is: "There is no deity for me except You."