Yahya related to me from Malik from Abdullah ibn Dinar fromAbu's-Salih as-Samman that Abu Hurayra used to say, "Anyone who haswealth on which he has not paid zakat will, on the day of rising, findhis wealth made to resemble a whiteheaded serpent with a sac of venomin each cheek which will seek him out until it has him in its power,saying, 'I am the wealth that you had hidden away.' "
USC-MSA web (English) reference: Book 17, Hadith 22
Arabic reference: Book 17, Hadith 601