Muwatta Malik 553
موطأ مالك#553Da'ifahya related to me from Malik that he had heard that AIi ibn Abi Talib used to rest his head on graves and lie on them. Malik said, "As far as we can see ,it is only forbidden to sit on graves to relieve oneself
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliMauquf Daif
In-book reference: 16:34