Musnad Abu Ya'la al-Mawsili 154:23

'Abd al-A'la ibn Hammad al-Narsi narrated to us, Hammad ibn Salamah narrated to us, from Ayyub, from Sa'id ibn Jubayr and Nafi', from Ibn 'Umar: That the Messenger of Allah (may Allah bless him and grant him peace) forbade the sale of *habal al-habalah* (the fetus of the fetus).