‏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....

‏الآداب : Hadeeth No:5358 This hadith bu been narrated on the authority of Abu Sa'id Khudri through another chain of transmitters....