Musnad Ahmad 30:505

'Abd al-Razzaq narrated to us, Ma'mar narrated to us, from Ayyub, from Ibn Sirin, from Abu Hurayrah, and from Hammam ibn Munabbih, from Abu Hurayrah, from the Prophet, peace and blessings of Allah be upon him, who said: "Indeed, Allah has ninety-nine names, one hundred minus one; whoever enumerates them will enter Paradise." And Hammam added in it, from Abu Hurayrah, from the Prophet, peace and blessings of Allah be upon him: "Indeed, He is Witr (Odd/One) and He loves the Witr."