CHAPTER: Placing The Right Hand On The Left In THe Prayer.
Jarir ad-Dabbi reported: I saw Ali (Allah be pleased with him) catching hold of his left hand) by his right hand on the wrist above the navel. Abu Dawud said: Saeed bin Jubair narrated the words: above the navel . Abu Mijlaz reported the words: below the navel . This has also been narrated by Abu Hurairah. But that is not strong.
Authentic