The Ruling on Placing a Marker on a Grave

Question:
I say: Honorable Shaykh, may Allah grant you success, some people place a marker on the grave of their deceased, such as some wood or iron or other things. What is the ruling on that?

Answer:
Yes, there is nothing wrong with placing a marker; a stone is placed. The Prophet (peace and blessings be upon him) placed a stone on the grave of Uthman ibn Maz'un and said So if a stone is placed for the visit, and only the one who placed it knows it, because people do not know that this stone was made for it, unlike writing that is read and carved, which is forbidden. As for the stone, there is nothing wrong with it and there is no harm in it.