Yahya related to me from Malik from Zayd ibn Aslam from Said ibn al-Musayyab that the Messenger of Allah, may Allah bless him and grant him peace, forbade bartering live animals for meat.
Muwatta Malik Book 31, Hadith 64
← Previous Hadith al-madamin, al-malaqih and habal al-habala. Al- madamin is the sale of what is in the wombs of female camels. Al- malaqih is the sale of the breeding qualities of camels" (i.e. for stud).

Malik said, "No one should buy a specified animal when it is concealed from him or in another place, even if he has already seen it, very recently or not so recently, and was pleased enough with it to pay its price in cash."

Malik said, "That is disapproved of because the seller makes use of the price and it is not known whether or not those goods are found to be as the buyer saw them or not. For that reason, it is disapproved of. There is no harm in it if it is described and guaranteed."

Muwatta Malik Book 31, Hadith 63 Next Hadith → Yahya related to me from Malik from Da'ud ibn al-Husayn that he heard Said ibn alMusayyab say, "Part of the gambling of the people of Jahiliya was bartering live animals for slaughtered meat, for instance one live sheep for two slaughtered sheep."

Muwatta Malik Book 31, Hadith 65