Riyad-us-Saliheen 134
Jabir (May Allah be pleased with him) reported that he heard Messenger of Allah (PBUH) saying, "Every good deed is charity".
[Al-Bukhari]
We come to know from this Hadith that whatever good action and deed is done by a Muslim, he gets a reward of Sadaqah on it. The word Ma'ruf stands here for every virtue and noble deed. Renunciation of evils is also a virtue (Mar'uf).