Jabir said God’s messenger forbade that graves should be plastered with gypsum, that any erection should be built over them, and that people should sit on them.
Abu Huraira reported God’s messenger as saying, “It is better that one of you should sit on live coals which burn his clothing and come in contact with his skin than that he should sit on a grave.”
Abul Hayyaj al-Asadi told that ‘Ali said to him, “I am sending you on the same mission as God’s messenger sent me. Do not leave an image without obliterating it, or a high grave without levelling it.”