‏الصلاة : Hadeeth No:995 Ibn Abbas reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: I was commanded to prostrate myself on the seven (bones) and forbidden to fold back hair and clothing. (The seven bones are): forehead, nose, bands, knees and feet....

‏الصلاة : Hadeeth No:942 Abu Huraira reported: The Prophet of Allaah (sallAllaahu alayhi wa sallam) said: When any one of you leads the people in prayer, he should be brief for among them are the young and the aged, the weak and the sick. But when one of you prays by himself, he may (prolong) as he likes....