It was narrated from 'Uqbah bin ' Amir that the Messenger of Allah P.B.U.H said: 'If I were to walk on a live coal or a sword, or if T were to sew my shoes to my feet, that would be better for me than walking on the grave of a Muslim. And I see no difference between relieving myself in the midst of the graves or in the middle of the marketplace. " (Da'if)