Muwatta Imam Malik (Riwayat Ibn al-Qasim)

It is narrated from Sayyiduna Ali ibn Abi Talib (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) forbade me from (wearing) silk garments, clothes dyed with yellow color, wearing a gold ring, and from reciting (the Qur’an) in bowing (i.e., reciting the Qur’an during ruku‘). Abu’l-Hasan (al-Qabisi) said: These are the words from the Book al-Jami‘, and in the Book of Salah it is stated that the Messenger of Allah (peace and blessings be upon him) forbade wearing silk garments, and in it is also that he forbade reciting the Qur’an in bowing.