Sahih Muslim
Sahih Muslim Book 035, Hadith Number 6478.
Hadith Section/Book: Sahih Muslim Sahih Muslim Book 35. The Rememberance Of Allah, Supplication, Repentance And Seeking Forgiveness
Chapter : Supplication should be made with conviction and will.
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: When one of you makes a supplication (to his Lord) one should not say: O Allah, grant me pardon, if Thou so likest, but one should beg one's (Lord) with a will and full devotion, for there is nothing so great in the eye of Allah which He cannot grant.
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: When one of you makes a supplication (to his Lord) one should not say: O Allah, grant me pardon, if Thou so likest, but one should beg one's (Lord) with a will and full devotion, for there is nothing so great in the eye of Allah which He cannot grant.