Volume 9, Book 93, Number 485:
Narrated ‘Abdullah bin ‘Amr:
Abu Bakr As-Siddiq said to the Prophet “O Allah’s Apostle! Teach me an invocation with which I
may invoke Allah in my prayers.” The Prophet said, “Say: O Allah! I have wronged my soul very much
(oppressed myself), and none forgives the sins but You; so please bestow Your Forgiveness upon me.
No doubt, You are the Oft-Forgiving, Most Merciful.”
Volume 9 – 1652 / 1700
SAHIH BUKHARI VOLUME 9 > BOOK 93: ONENESS, UNIQUENESS OF ALLAH (TAWHEED)