According to tradition, Muhammad (may peace be upon him) is said to have invoked God by a number of Names. According to a Hadith, Sahih Muslim:

Abu Hurairah 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."