Umm Salama said she was wearing gold ornaments and asked God’s messenger whether that was a treasure,* to which he replied, “Whatever reaches a quantity on which zakat is payable is not a treasure when the zakat is paid.” Malik and Abu Dawud transmitted it. * The word kanz which means a treasure is used as a technical term for property liable to zakat on which the zakat is not paid.
Reported by Abu Dawud (No. 1564). Cited in Mishkat al-Masabih (No. 1810).