al-Qasim bin Zakaria bin Yahya القاسم بن زكريا بن يحيى البغدادي · The Book of Adornment

"The Messenger of Allah forbade me from four things: Wearing garments dyed with safflower, and from wearing gold rings, and from wearing Al-Qassiyah garments, and reciting Qur'an while I am bowing."