What is the ruling on placing two stones on a man’s grave and three stones on a woman’s grave to distinguish it?

Question:
A questioner says: In our country, they place two stones at the ends of a man’s grave so that it is known to be a grave, but they distinguish a woman’s grave by placing three stones. Is there a basis for this?

Answer:
The matter is simple in this; I do not know of any basis for this. As for placing two stones at the ends of the grave, this is a known practice so that it is not trampled upon or flattened; there is no harm in that. As for placing a stone in the middle, there is no need for that, neither for a man nor for a woman. Yes.