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." (Using translation from Muslim 2677b)
عَنِ النَّبِيِّ ﷺ قَالَ إِنَّ لِلَّهِ تِسْعَةً وَتِسْعِينَ اسْمًا مِائَةً إِلَّا وَاحِدًا مَنْ أَحْصَاهَا دَخَلَ الْجَنَّةَ وَزَادَ فِيهِ هَمَّامٌ عَنْ أَبِي هُرَيْرَةَ عَنِ النَّبِيِّ ﷺ إِنَّهُ وِتْرٌ يُحِبُّ الْوِتْرَ