On one occasion, Hazrat Abu Bakr Siddiq (may Allah be pleased with him) submitted to the Prophet (peace and blessings be upon him): O Messenger of Allah! Teach me a supplication that I may recite in my prayer. The Prophet (peace and blessings be upon him) taught him this supplication «اللَّهُمَّ إِنِّي ظَلَمْتُ نَفْسِي ظُلْمًا كَثِيرًا، وَلَا يَغْفِرُ الذُّنُوبَ إِلَّا أَنْتَ، فَاغْفِرْ لِي مَغْفِرَةً مِنْ عِنْدِكَ، وَارْحَمْنِي، إِنَّكَ أَنْتَ الْغَفُورُ الرَّحِيمُ» : O Allah! I have greatly wronged myself, and none forgives sins except You, so forgive me with Your special grace and have mercy on me. Surely, You are the Most Forgiving, Most Merciful.