An-Nawawi did not mention any other Ahadith in Al-Khulasah then the hadith of Wail bin Hujr (radiallahu anh). Ibn Hajar has mentioned it in his Bulugh al Maram. Ibn Rajab al Hanbali in his Sharh of Bukhari Fath ul Bari hadith 740 said that putting the hands on the chest: Was narrated as the action of Ali (radiallahu anh) Was narrated as the action of Sa'eed bin Jubair (rah) An opinion by Imam Shafi'i (rah) An opinion by Imam Ahmad (rah) Another thing a authentic hadeeth which described the way the Prophet (salallahu alayhi was sallam) used to put his hands over one another: He put his right hand on top of his left hand, wrist and forearm. Isn't such position difficult to achieve with the hands under the navel ?