Musnad Ahmad 27:581

Bahz and Muhammad ibn Ja'far narrated to us, they said: Shu'bah narrated to us, he said: Bahz said: 'Uqbah ibn Hurayth narrated to us, I heard 'Abdullah ibn 'Umar say: The Messenger of Allah (may Allah bless him and grant him peace) forbade the *jar* (earthenware jar), and it is the *duba'* (gourd), and the *muzaffat* (pitch-coated vessel). And he said: "Prepare your nabidh (fermented drink) in waterskins."