Sahih Muslim 2677
Sahih Muslim · Book 48: The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness · The Names Of Allah, Exalted is He, And The Virtue Of The One Who Learns Them By Heart
Abu Huraira reported Allah's Apostle (ﷺ) as saying:
حَدَّثَنِي مُحَمَّدُ بْنُ رَافِعٍ ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ ، حَدَّثَنَا مَعْمَرٌ ، عَنْ أَيُّوبَ ، عَنِ ابْنِ سِيرِينَ ، عَنْ أَبِي هُرَيْرَةَ ، وَعَنْ هَمَّامِ بْنِ مُنَبِّهٍ ، عَنْ أَبِي هُرَيْرَةَ ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " إِنَّ لِلَّهِ تِسْعَةً وَتِسْعِينَ اسْمًا مِائَةً إِلاَّ وَاحِدًا مَنْ أَحْصَاهَا دَخَلَ الْجَنَّةَ " . وَزَادَ هَمَّامٌ عَنْ أَبِي هُرَيْرَةَ عَنِ النَّبِيِّ صلى الله عليه وسلم " إِنَّهُ وِتْرٌ يُحِبُّ الْوِتْرَ " .
Verily, there are ninety-nine names for Allah, i. e. hundred excepting one. He who enumerates them would get into Paradise. And Hammam has made this addition on the authority of Abu Huraira who reported it from Allah's Apostle (ﷺ) that he said:" He is Odd (one) and loves odd number."