Abu Bakr (RA) reported that he said to Allahs Messenger ﷺ : Teach me a supplication which I should recite in my prayer. Thereupon he (the Holy Prophet) said: Recite: "O Allah, I have done great wrong to myself." According to Qutaiba the words were: (much wrong) there is none to forgive the sins but Thou only, say: "Grant me pardon from Thyself, have mercy upon me for Thou art much Forgiving and Compassionate."