‏السلام : Hadeeth No:5393 Ibn Mas'ud reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said to me: The sign that you have been permitted to come in is that the curtain is raised or that you hear me speaking quietly until I forbid you....

‏الأشربة : Hadeeth No:4948 It is reported on the authority of Jabir and Ibn Umar that Allaah's Messenger (sallAllaahu alayhi wa sallam) forbade (the preparation) of Nabidh in hollow stump and varnished jar and gourd....