Sayyiduna Samurah (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) forbade "selling a sheep for meat."
This chain is sahih (authentic). Whoever affirms that al-Hasan al-Basri heard from Samurah bin Jundub counts it as connected, and whoever does not affirm it, then it is a good mursal report, to be joined with the mursal reports of Sa'id bin al-Musayyib and al-Qasim bin Abi Bazzah and the statement of Abu Bakr al-Siddiq (may Allah be pleased with him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10569