Sunan Ibn Majah 1563
سنن ابن ماجه#1563SahihIt was narrated that Jabir said:“The Messenger of Allah (ﷺ) forbade writing anything on graves.”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Zubair Ali ZaiHasan
In-book reference: 6:131