Abu Dawud Book 29, Hadith Number 4223.
Chapter : Wearing gold by women.
Narated By ‘Aisha, Ummul Mu’minin : The Prophet (PBUH) got some ornaments presented by Negus as a gift to him. They contained a gold ring with an Abyssinian stone. The Apostle of Allah (PBUH) turning his attention from it took it by means of a stick or his finger, then called Umamah, daughter of Abu al-‘As and daughter of his daughter Zaynab, and said: Wear it, my dear daughter.