‏الصلاة : Hadeeth No:1508 Ibn 'Umar reported: When the Messenger of Allaah (sallAllaahu alayhi wa sallam) was in a state of hurry on a journey, he combined the sunset and 'Isha' prayers....

‏الصلاة : Hadeeth No:813 Abu Huraira reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: When anyone amongst you utters Amin in prayer and the angels in the sky also utter Amin, and this (utterance of the one) synchronises with (that of) the other, all his previous sins are pardoned....