Ruling of Allah and His Messenger on the unlawful graves that are raised above the ground
If the case is as mentioned, then these graves do not conform to the guidance of the noble Shari`ah (Islamic law). It is your duty to warn those who build such graves and advise them (Part No. 7; Page No. 331) to remove the innovations they introduced into the graves of Muslims, such as those mentioned in the question and others like plastering or inscribing on them, and putting lights, pictures and flowers. They must adhere to what is Islamically lawful in this respect. If they comply with it, then praise be to Allah for that. Otherwise, do not bury your dead in these spots and you must look for other graves that are free of these innovations and prohibitions. This is because the Prophet (peace be upon him) forbade
plastering, sitting on, building over, and making engravings on graves. May Allah grant us success. May peace be upon our Prophet Muhammad, his family, and Companions!