‏الصلاة : Hadeeth No:992 Ibn 'Abbas reported from the Prophet of Allaah (sallAllaahu alayhi wa sallam): I was commanded to prostrate myself on seven bones and not to fold back clothing or hair....

‏الصلاة : Hadeeth No:977 This hadith is transmitted on the authority of 'Ali, but he made no mention of" while in prostration"....