Sahih al-Bukhari 7553

Arabic

وَقَالَ لِي خَلِيفَةُ بْنُ خَيَّاطٍ حَدَّثَنَا مُعْتَمِرٌ، سَمِعْتُ أَبِي، عَنْ قَتَادَةَ، عَنْ أَبِي رَافِعٍ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ لَمَّا قَضَى اللَّهُ الْخَلْقَ كَتَبَ كِتَابًا عِنْدَهُ غَلَبَتْ ـ أَوْ قَالَ سَبَقَتْ ـ رَحْمَتِي غَضَبِي‏.‏ فَهْوَ عِنْدَهُ فَوْقَ الْعَرْشِ ‏"‏‏.‏

English translation

Narrated Abu Huraira:I heard Allah's Messenger (ﷺ) saying, "Before Allah created the creations, He wrote a Book (wherein He has written): My Mercy has preceded my Anger." and that (Book) is written with Him over the Throne

Reference: Sahih al-Bukhari 7553, Book of Oneness, Uniqueness of Allah (Tawheed). English translation by Dr. Muhammad Muhsin Khan.