Saheeh al-Bukhaaree, Chapter: “Building A Mosque Over A Grave”
‘Aaisha (radhi Allaahu ‘anhaa) said:
When the Prophet (salallaahu ‘alaihi wassallam) became ill, some of his wives mentioned a church they had seen in Ethiopia called Maariyah. Both Umm Salamah and Umm Habeebah had been to Ethiopia. They spoke about the beauty of the church and the images inside it. The Messenger (salallaahu ‘alaihi wassallam) raised his head and said:
“When a pious man would die from amongst those people, they would build a place of worship over his grave, then they would make those images in it. They are the worst of creation in the site of Allaah. (No. 1341).
The Sufis are renowned worldwide for building structure, domes, courtyards and mosques over graves. They gather there and carry out acts of worship in and around these structures, just as the Prophet mentioned in the above narration. These are acts of polytheism rejected by Islaam, condemned by Allaah and His Messenger (salallaahu ‘alaihi wassallam).