Yahya related to me from Malik from Zayd ibn Aslam from Ata ibnYasar that the Messenger of Allah, may Allah bless him and grant himpeace, was asked about al-Ghubayra. He said, "There is no good in it,"and forbade it. Malik said, "I asked Zayd ibn Aslam, 'What is al-Ghubayra?' He said, 'It is an intoxicant.' "
USC-MSA web (English) reference: Book 42, Hadith 10
Arabic reference: Book 42, Hadith 1549