Yahya related to me from Malik from Zayd ibn Aslam from Said ibnal-Musayyab that the Messenger of Allah, may Allah bless him and granthim peace, forbade bartering live animals for meat. (IT)
USC-MSA web (English) reference: Book 31, Hadith 64 (IT)
Arabic reference (IT): Book 31, Hadith 1356 (IT)