Abu Huraira reported God’s messenger as saying, “When God completed the creation He wrote the following which is with Him above His Throne, ‘My mercy has taken precedence over my anger’.” A version says, “Has prevailed over my anger.” (Bukhari and Muslim).
Hadith Referenceمشكوة المصابيح / كتاب الدعوات / 2364
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (3194) و مسلم (2751/16)»