Muhammad bin 'Ubaid al-Tanafasi محمد بن عبيد بن أبي أمية الطنافسي · The Book of Funerals

"Whoever throws himself, he will be in the Fire of Hell, throwing himself down forever and ever. And whoever kills himself with a piece of iron"- then I missed something ( one of the narrators) Khalid said-"will have his piece of iron in his hand, stabbing himself in the stomach in the Fire of Hell, forever and ever."

"The Messenger of Allah forbade plastering over graves."