Musnad Ahmad 788:161

Yahya ibn Sa'id narrated to us, from 'Ubayd Allah, Nafi' informed me, from Sa'id ibn Abi Hind, from Abu Musa, from the Prophet, peace and blessings of Allah be upon him, who said: "The wearing of silk and gold has been permitted for the women of my nation, and it has been forbidden for its males."