Musnad Ahmad 25:1157

Hammad ibn Khalid narrated to us, from Malik, from al-Zuhri, from Ubayd Allah ibn Abd Allah, from Ibn Abbas: That the Prophet, peace and blessings of Allah be upon him, passed by a dead sheep and said, "To whom did this sheep belong?" They said, "To Maymunah." He said, "Why did you not make use of its hide?"