On the 13 page of Phurchog Ngawang Jampa's (1682-1762) work titled White Lotus Rosary: the Catalogue of the Establishment of the Four Monastic Seats and the Lower and the Upper Tantric College, we find:

Thus, at the time when Je (Tsongkhapa) himself was alive, apart from those dharma protectors who are bound by oath and are mentioned in the tantras themselves, no objects for propitiating or seeking the help of harmful negative worldly spirits, who would express their wrath on even very minor matters, were ever installed within the premises of this monastic seat (Ganden Monastery). As a result, all the members of the community, both Lamas and disciples lived in harmony and the tradition of study and practice flourished. Even (the cairn) to the spirit of Tsongkhapa's birthplace (Jhowo-Chhing-kar) was placed outside the monastery. However, nowadays, many people who consider themselves to be followers of Tsongkhapa, and who adopt the three robes of a fully ordained Buddhist monk, go for refuge in ghostly spirits. They will have to face the consequence of meeting with great misfortune.