Sahih Muslim Book 37, Hadith Number 6632.
Chapter : The mercy of Allah predominates his wrath.
Salman Farisi reported Allah’s Messenger (may peace be upon him) as saying: Verily, there are one hundred (parts of) mercy for Allah, and it is one part of this mercy by virtue of which there is mutual love between the people and ninety-nine reserved for the Day of Resurrection.