Sahih Muslim #6809 · The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness

Sahih MuslimAbu Huraira reported Allah's Messenger
Sahih Muslim · Book 48 · The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness
Sahih Muslim · كتاب 48 · كتاب الذكر والدعاء والتوبة والاستغفار
There are ninety-nine names of Allah; he who commits them to memory would get into Paradise. Verily, Allah is Odd (He is one, and it is an odd number) and He loves odd number. And in the narration of Ibn 'Umar (the words are):" He who enumerated them."
حَدَّثَنَا عَمْرٌو النَّاقِدُ، وَزُهَيْرُ بْنُ حَرْبٍ، وَابْنُ أَبِي عُمَرَ، جَمِيعًا عَنْ سُفْيَانَ، - وَاللَّفْظُ لِعَمْرٍو - حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏
"‏ لِلَّهِ تِسْعَةٌ وَتِسْعُونَ اسْمًا مَنْ حَفِظَهَا دَخَلَ الْجَنَّةَ وَإِنَّ اللَّهَ وِتْرٌ يُحِبُّ الْوِتْرَ ‏"‏ ‏.‏ وَفِي رِوَايَةِ ابْنِ أَبِي عُمَرَ ‏"‏ مَنْ أَحْصَاهَا ‏"‏ ‏.‏
Reference : Sahih Muslim 6809In-book reference : Book 48, Hadith 5