Jabir bin Abdullah reported,

The Messenger of Allah ﷺ forbade plastering graves with gypsum, sitting on them, or building structures over them.

Azami 3787

Sahih

عن جابر قال

نهى رسول الله ﷺ أن يجصص القبر، وأن يقعد عليه، وأن يبنى عليه.

الأعظمي 3787صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Funerals
Chapter
Graves
Section
Prohibition of plastering graves and writing on them
Numbering
Jami al-Kamil 3787 (2nd edition)
Azami 3787