Reference: al-Fataawa al-Jaami’ah lil-Mar.ah al-Muslimah – Volume 1, Question 268, Page 271
Fataawa at-Ta’ziyyah – Page 30
Question: What is your opinion regarding placing two stones on the grave of men and one stone on the grave of women – is this differentiation legislated?
Response: This differentiation is not legislated. The scholars have said there is no harm in placing one or two stones or one or two bricks in order to indicate the [presence of a] grave so that it is not redug a second time. As regards differentiating between the men and women, then there is no [legislated] basis for this.