Abdullah bin Mas’ud (may Allah be pleased with him) narrates that I heard the Messenger of Allah (ﷺ) saying: “Whoever does not give the zakat of his wealth, on the Day of Resurrection his wealth will be turned into a bald serpent. The man will run from it, and it will chase him until it is made to encircle his neck like a collar.” Then the Messenger of Allah (ﷺ) recited this verse to us: “Soon, on the Day of Resurrection, those things they withheld out of miserliness will be made into collars around their necks.” (Aal-e-Imran: 180)
Hadith Referenceمسند الإمام الشافعي / كتاب الزكاة / 681
Hadith Takhrijأخرجه الترمذي، تفسير القرآن باب ومن سورة آل عمران (3012) ۔ وقال ”حسن صحيح“ وابن ماجه ، الزكاة، باب ماجاء في منع الزكاة (1784) ۔ وصححه ابن خزيمة (2256)۔