Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Charity is due from every joint of each of you; every time you say «سبحان الله » it is charity, and every time you say «الحمد لله» it is charity, every time you say «لا الہ الا اللہ» it is charity, and every time you say « اللہ اکبر» it is charity. Enjoining good is charity and forbidding evil is charity, and all of these can be replaced by the two rak‘ahs that a person prays at the time of Duha."