Sahih Muslim , Book 37, Hadith 6630 (USC-MSA) ⓘ
Abu Huraira reported Allah's Messenger as saying: Allah created one hundred (parts of mercy) and He distributed one amongst His creation and kept this one hundred excepting one with Himself (for the Day of Resurrection).
حَدَّثَنَا يَحْيَى بْنُ أَيُّوبَ، وَقُتَيْبَةُ، وَابْنُ، حُجْرٍ قَالُوا حَدَّثَنَا إِسْمَاعِيلُ، - يَعْنُونَ ابْنَ جَعْفَرٍ - عَنِ الْعَلاَءِ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " خَلَقَ اللَّهُ مِائَةَ رَحْمَةٍ فَوَضَعَ وَاحِدَةً بَيْنَ خَلْقِهِ وَخَبَأَ عِنْدَهُ مِائَةً إِلاَّ وَاحِدَةً " .
also referenced under: Book 50, Hadith 21 (In-Book) & Hadith 2752 (Reference)