Musannaf Ibn Abi Shaybah

Hazrat Ali (may Allah be pleased with him) narrates from Zaid, who says: I was sitting with Hazrat Saeed bin Musayyib, while I was wearing a cloak made of wool and silk. So he held the sleeve of my cloak and said, "How beautiful is your cloak!" He says, I said, "People have declared it impermissible for me." He asked, "Who has declared it impermissible?" I said, "Hazrat Salim has." He said, "When your heart is correct, then wear whatever you wish." The narrator says, I mentioned the words of both of them to Hasan, so he said: "The correction of the heart is also in leaving clothes made of wool and silk."