Majma al-Zawaid — Hadith 4324

Sayyiduna Ali (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Indeed, Allah Almighty has made zakah obligatory upon the well-off among the Muslims, in their wealth, in a measure that suffices their poor, so that the poor would face no hardship when they are hungry and in need of clothing, except for what their well-off people squander. Listen! Allah Almighty will take a severe reckoning from them and will punish them with a painful punishment."
Al-Tabarani recorded it in al-Mu'jam al-Saghir and al-Mu'jam al-Awsat. He said: Thabit bin Muhammad al-Zahid is alone in narrating it.
(Allamah al-Haythami says:) I say: Thabit is one of the narrators of the Sahih. The remaining narrators of this report have been declared trustworthy, and they have also been criticised.