Musnad Abu Ya'la al-Mawsili 109:243

Abu Khaythama narrated to us, Rawh narrated to us, Zakariyya ibn Ishaq narrated to us, Abu al-Zubayr narrated to us, that he heard Jabir ibn Abdullah saying: The Messenger of Allah (may Allah bless him and grant him peace) forbade wiping [oneself] with a bone or with dung.