Abu Hurairah (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "On every joint of man, there is charity, on everyday when the sun rises: doing justice between two men is charity, and assisting a man to ride an animal or to load his luggage on it is charity; and a good word is charity, every step which one takes towards (the mosque for) Salat is charity, and removing harmful things from the way is charity".[Al-Bukhari and Muslim].
Arabic/English book reference: Book 1, Hadith 248