Mishkat al-Masabih 9 Supplications كتاب الدعوات 61

عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِنَّ لِلَّهِ تَعَالَى تِسْعَةً وَتِسْعِينَ اسْمًا مِائَةً إِلَّا وَاحِدًا مَنْ أَحْصَاهَا دَخَلَ الْجَنَّةَ» . وَفِي رِوَايَة: «وَهُوَ وتر يحب الْوتر»

Abu Huraira reported God’s messenger as saying, “God had ninety-nine names, one short of a hundered. He who retains them in his memory* will enter paradise.” A version has, “And He is One. He loves what is single.” *The Arabic is ahsaha , a word which has different meanings. Besides the meaning above can mean to number, to reach the last number, to understand, to attain comprehensive knowledge. (Bukhari and Muslim.)