Anas bin Maalik Radiyallahu 'Anhu says:
"I remained in the service (of Rasulullah Sallallahu 'Alayhi Wasallam for ten years. He never once told me 'Oof'. When I did something, he never asked me, why did you do so? When I did not do a certain task, he never asked me why I did not do it. Rasulullah Sallallahu 'Alayhi Wasallam had the best character among all people. (and also possessed the most excellent features, so much so,) that I never felt a silk cloth, nor pure silk, nor any other thing softer than the palm of Rasulullah Sallallahu 'Alayhi Wasallam. Nor did I smell any musk or any other fragrance, more sweet smelling than the sweat of Rasulullah Sallallahu 'Alayhi Wasallam".
English reference: Book 47, Hadith 328
Arabic reference: Book 48, Hadith 345