Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) forbade "wearing a gold ring, silk garments, reciting the Qur'an in bowing (ruku') and prostration (sujud), and wearing yellow-dyed clothing."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4212