Visiting the mother's grave when its location is unknown

Question:
Salim asks your eminence, saying: Peace be upon you, and Allah’s mercy and blessings. Honorable Shaykh, my mother passed away when I was very young, and I do not know her specific grave. I wish to visit the cemetery where she was buried. What is obligatory for me regarding the visit and my intention to visit my mother’s grave? Please note that when I asked those who buried her, they did not inform me of her location.

Answer:
Praise be to Allah. It is not obligatory for him to know her grave or her location. He can make du'a for her in any place, give charity on her behalf in any place, increase his supplications for her, and increase his charity on her behalf. He can perform Hajj and 'Umrah on her behalf, and if Allah accepts this, it will reach her. It is not obligatory for him to know her grave or visit it. If it happens that he finds her grave and visits it, greets her, and makes du'a for her, that is good. But if he does not know her grave, this is not obligatory, and his dutifulness to her is not cut off by not knowing her grave. Yes.