The ruling on supplication at the grave and raising the hands

Question:
He says: Honorable Shaykh, may Allah grant you success, I visit my mother's grave at intervals to greet her, and I stand at her grave raising my hands to supplicate for her. What is the duration for which it is permissible to remain in supplication for her? Do I sit while supplicating? And what do I do? Do I face the qiblah or face the grave?

Answer:
It is better that you supplicate while standing; this is the best. There is no harm in raising your hands, because this is among the causes for the acceptance of supplication: raising the hands to Allah (Glorified and Exalted is He). Do not prolong your stay with her. Yes.