Yazid bin Harun يزيد بن هارون · The Book of Adornment

"The Messenger of Allah addressed us and said: 'O women, do you not have any silver to wear for adornment? For there is no woman among you who wears gold and shows it, but she will be punished because of it.'"

"I heard 'Ali say: 'The Messenger of Allah forbade me- but I do not say that he forbade you- from wearing gold rings, Al-Qassi, and garments dyed with safflower, and reciting Qur'an while bowing.'"

"The Messenger of Allah forbade me to wear a ring on this one and this one," meaning the forefinger and middle finger. And this is the wording of Ibn Al-Muthanna.

"The Messenger of Allah forbade men to use saffron."