Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that the Prophet (peace and blessings be upon him) said: "Indeed, Allah Almighty created one hundred mercies. One mercy among them He has distributed among the creation, and ninety-nine mercies are for the Day of Resurrection."
Al-Tabarani and al-Bazzar recorded it, and the chain of both is hasan (good). (Allamah Haythami says:) I say: Some hadiths about the vastness of Allah Almighty's mercy have already passed in the Book of Repentance.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البعث / 18561
Hadith Gradingمحدثین:إسنادہ حسن۔
Hadith Takhrij«اخرجه البزار فى المسند (3475) اخرجه الطبراني فى المعجم الكبير (12047) ، أخرجه المعجم الكبير للطبراني برقم: 12047»