Hazrat Abu Bakr Siddiq (may Allah be pleased with him) said: I submitted to the Messenger of Allah (peace and blessings be upon him), "Teach me a supplication which I may recite in my prayer." The Prophet (peace and blessings be upon him) said, "Recite this supplication: 'O Allah! I have greatly wronged myself (by committing sins), and there is no one who forgives sins except You. So grant me abundant forgiveness from Yourself and have mercy on me, for surely You alone are the Forgiving, the Merciful.'"