Musannaf Ibn Abi Shayba 16:1052

Abu Bakr narrated to us, he said: Abu Dawud al-Tayalisi narrated to us, from Shu'bah, from a sheikh from the people of Wasit, who said: I asked Abu 'Iyad about the hair of a pig being placed upon the wound of a beast of burden, and he disliked it.