'Aayeshah Radiyallahu 'Anha reports, that:
"It was not the nature of Rasulullah Sallallahu 'Alayhi Wasallam to talk indecently, nor did he engage himself in the use of obscene language. Nor did he shout and talk in the bazaars (which is against dignity). He did not avenge a bad deed with a bad one, but forgave it, and thereafter did not even mention it".
English reference: Book 47, Hadith 330
Arabic reference: Book 48, Hadith 347