Abu Dharr (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "When you get up in the morning, charity is due from every one of your joints. There is charity in every ascription of glory to Allah; there is charity in every declaration of His Greatness; there is charity in every utterance of praise of Him; there is charity in every declaration that He is the only true God (worthy of worship); there is charity in enjoining good; there is charity in forbidding evil. Two Rak'ah of Duha (Forenoon prayer) is equal to all this (in reward)".[Muslim].
Arabic/English book reference: Book 1, Hadith 118