‏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....

‏الصلاة : Hadeeth No:1537 'Abdullah b. Sarjis reported: A person entered the mosque, while the Messenger of Allaah (sallAllaahu alayhi wa sallam) was leading the dawn prayer. He observed two rak'ahs in a corner of the mosque, and then joined the Messenger of Allaah (sallAllaahu alayhi wa sallam) in prayer. When the Messenger...