Sahih Muslim | Book 35 | Chapter 2

Narrated by Abu Huraira
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: 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.

Narrated by Abu Huraira
Abu Huraira reported Allah's Apostle (may peace be upon him) as saying: 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 (may peace be upon him) that he said: "He is Odd (one) and loves odd number.