Wahhabi movement
The founder of the Wahhabi movement, Muhammad ibn Abd al-Wahhab derived the prohibition to build mosques over graves from a "hadith" attributed to the Prophet Muhammad in which he said "May God curse the Jews and Christians who make the graves of their prophets into places of worship; do not imitate them." Additionally, he commanded leveling of the graves ("taswiyat al-qubur"), which the scholar Imam Al-Shafi'i supported.