‏الصلاة : Hadeeth No:944 Abu Huraira reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: When any one of you leads people in prayer, he must shorten it for among them are the weak, the infirm and those who have business to attend....

‏الصلاة : Hadeeth No:1255 Abu Qatada reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: When the Iqama is pronounced do not get up till you see me Ibn Hatim was in doubt whether it was said:" When the Iqama is pronounced" or" When call is made"....