Similar to the hadith about the ring. Sufyan was asked, "How do you pay zakat on it?"He replied, "You add it to other wealth."
حدثنا صفوان بن صالح حدثنا الوليد بن مسلم حدثنا سفيان
نحو حديث الخاتم قيل لسفيان كيف تزكيه قال تضمه إلى غيره
No references are available.
Takhrij, its isnad is daif. Bayhaqi narrated it, 4/145, from Sufyan Thawri, from Umar bin Yaala, from his father, from his grandfather, with similar wording, and so on. Umar bin Yaala is daif (Taqrib 4933), and his father is daif.