Musnad Ahmad 5:534

Waki’ and ‘Uthman ibn ‘Umar narrated to us, they said: Usamah ibn Zayd narrated to us. Waki’ said: He said: I heard ‘Abdullah ibn Hunayn—and ‘Uthman said: From ‘Abdullah ibn Hunayn—I heard ‘Ali saying: "The Messenger of Allah (ﷺ) forbade me—and I do not say he forbade you—from [wearing] saffron-dyed garments and wearing gold rings."