Musnad Abu Ya'la al-Mawsili 3:16

Abu Khaythama narrated to us, Yazid bin Harun narrated to us, Muhammad bin ‘Amr narrated to us, from Ibrahim bin ‘Abdullah bin Hunayn, from his father, from ‘Ali, who said: The Messenger of Allah (ﷺ) forbade me—and I do not say he forbade you—from wearing a gold ring, and from wearing Al-Qassi (a type of silk garment), and from reciting [the Qur’an] while I am bowing.