I bear testimony to the fact that Ibn 'Umar and Ibn 'Abbas testified to the fact that Messenger of Allah ﷺ forbade (the preparation) of Nabidh in gourd in vessel besmeared with pitch and hollow stump.
أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى عَنِ الدُّبَّاءِ وَالْحَنْتَمِ وَالْمُزَفَّتِ وَالنَّقِيرِ