Sahih Bukhari
Sahih Bukhari Volume 002, Book 022, Hadith Number 306.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 22. Actions While Praying
Narated By Sahl bin Sad : The people used to offer the prayer with the Prophet with their waist-sheets tied round their necks because of the shortness of the sheets and the women were ordered not to lift their heads till the men had sat straight.