Musannaf Ibn Abi Shayba 35:369

Abdullah ibn al-Mubarak and Yazid ibn Harun narrated to us, from Sa'id ibn Abi 'Aruba, from Qatada, from Abu al-Malih, from his father, who said: The Prophet, peace and blessings of Allah be upon him, forbade the skins of predatory animals. Yazid said: "That they be used as bedding."