Musnad Ahmad 788:232

Abd al-Samad narrated to us, he said: Abd al-Rahman—meaning Ibn Abd Allah ibn Dinar—narrated to us, he said: Usayd ibn Abi Usayd narrated to me, from Ibn Abi Musa, from his father, or from Ibn Abi Qatadah, from his father, that the Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever is pleased that his beloved be ringed with a ring of fire, let him ring her with a ring of gold. And whoever is pleased that his beloved be bracelet-ed with a bracelet of fire, let him bracelet her with a bracelet of gold. But as for silver, then play with it as you wish."