Abu Musa Al-Ash'ari (May Allah be pleased with him) reported: The Prophet ﷺ said, "Giving in charity is an obligation upon every Muslim". It was said (to him): "What about one who does not find (the means) to do so?" He ﷺ said, "Let him work with his hands, thus doing benefit to himself and give in charity". It was said to him: "What if he does not have (the means) to do so?" He ﷺ said, "Then let him assist the needy, the aggrieved". It was said: "What about if he cannot even do this?" He ﷺ said, "Then he should enjoin good". He was asked: "What if he cannot do that?" He (the Prophet ﷺ) said, "He should then abstain from evil, for verily, that is a charity from him". Al-Bukhari and Muslim.