Hadith 5:944
Abu Bakr narrated to us, he said: Mu'adh ibn Mu'adh narrated to us, from Ash'ath, from al-Hasan, that he said regarding a man who neglected his Zakat until his wealth was gone: "It is a debt upon him until he pays it."
حدثنا أبو بكر قال حدثنا معاذ بن معاذ عن أشعث عن الحسن أنه قال في رجل فرط في زكاته حتى ذهب ماله قال هو دين عليه حتى يقضيه