Hawzah News Agency – The merciful prophet of Islam (pbuh) says:

إنَّ على‏ كُلِّ مُسلمٍ في كلِّ يَومٍ صَدَقةً، قيلَ: مَن يُطِيقُ ذلكَ؟ قالَ صلى اللَّه عليه وآله: إماطَتُكَ الأذى‏ عنِ الطَّريقِ صَدَقةٌ، وإرشادُكَ الرَّجُلَ إلى الطَّريقِ صَدَقةٌ، وعِيادَتُكَ المَريضَ صَدَقةٌ، وأمرُكَ بالمَعروفِ صَدَقةٌ، ونَهيُكَ عنِ المُنكَرِ صَدَقةٌ، ورَدُّكَ السَّلامَ صَدَقَةٌ.

‘Verily every single Muslim is to give in charity every single day.’ When asked who would be capable of such a thing, he replied, ‘Your removal of an obstacle from the road is a charitable act; your guiding someone the way is a charitable act; your visiting the sick is a charitable act; your enjoinment of good to others is a charitable act; your forbidding others from wrongdoing is a charitable act, and your returning the greeting of peace is a charitable act.’

source: Bihar al-Anwar, v. 75, p. 50, no. 4