Narrated 'Adi bin Hatim:
We came to 'Umar in a delegation (during his rule). He started calling the men one by one, calling each by his name. (As he did not call me early) I said to him. "Don't you know me, O chief of...
I have prostrated my face to the One Who created it, and gave it hearing and sight by His might and His power. Glory is to Allah, the Best of creators.
Info: At-Tirmidhi 2/474, Ahmad 6/30, and Al-Hakim.