It is reported that a shaykh (older man) once came and greeted ‘Alī – Allāh be pleased with him, wearing a cloak decorated with silk at the front. He said to the man, "What is this filth under your beard?" The man looked around and said, "I do not see anything." Another man said, "He means the silk embroidery." The shaykh said, "In that case, we will throw it away and never wear [such a thing] again."

Ibn Abī Shaybah, Al-Muṣannaf article 25187