Reference: al-Bid’u wal-Muhdathaat wa maa laa asla lahu – Page 403
Question: What is the ruling regarding making tawaaf around the Prophet’s chamber?
Response: Some visitors to the al-Masjid an-Nabawee make tawaaf around the grave of the Prophet ﷺ and touch the caging of the chamber and its walls and, quite possibly, they kiss it with their lips and place their cheeks upon it. All of this is a detestable innovation! Certainly, making tawaaf around other than the Ka’bah is impermissible; also, touching, kissing and placing the cheeks has been legislated for a specific place on the Ka’bah [between al-Hajar al-Aswad and the door of the Ka’bah].
So, worshiping Allaah in this way, on the walls of the chamber, does not increase a person in anything except distancing himself from Allaah.