Sunan an-Nasa'i 2027
سنن النسائي#2027SahihIt was narrated that Jabir said:"The Messenger of Allah forbade building over graves, making them larger or plastering over them." (One of two narrators) Sulaiman bin Musa added: "Or writing on them
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 21:210