It is narrated from Sayyiduna Salman al-Farisi (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Allah Almighty created one hundred mercies; through one of them this entire creation shows mercy to one another, and ninety-nine mercies are kept for the Day of Resurrection."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6101