Muhammad described himself in a speech:

I am the master of mankind, without vanity. 

And I am the most eloquent amongst all Arabs.

And I am the first one (will be the first one) 
    to knock at the door of paradise.

And I am the first from above for whom the earth will crack 
    (to be raised from the grave).

Abraham vouched for me and Jesus announced my coming. 

And when my mother delivered me, she saw a light enlightening 
   (the darkness) between the east and the west. 

God created mankind 
    and He made me amongst the best of his creatures;
and He made them (His creatures) groups, 
    and He placed me in the best of the groups. 
He made them tribes, 
    and He placed me in the best tribe.
He made them families 
   and He placed me in the best family; 

So I am better than all of you, 
   familywise and ancestorwise.

(Al-Ukdul-Fareed)

Al-Ukdul-Fareed (The Unique Necklace) is a collection of literature, poems, sayings, for wise men, scientists, religious people, leaders, and little stories and events from the history of Arabs before and after Islam. It consists of 25 (bab) chapters, each called "Jaw-hara" pearl. The book was written by Ibn Abd Rabbi'hil Andulusi born 246 died 327 A.H.

The above speech is found in volume 4, chapter Al-asjada al-thaniya.

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