The sacred relic of Dobji Dzong is the statue of Jetsun Milarepa, a Tibetan saint, brought by Tshamdra Je Ngawang Duba when he went to Tibet on pilgrimage. He visited Rulung monastery and offered butter tea, and offering that was very expensive in those days because of the large number of students and teachers in the monastery. In return, the Tibetan government offered him the statue of Milarepa as a token of appreciation. The statue was supposed to be taken to Tshamdra Goenpa, but his residence was in present day Dobji Dzong, so he was unwilling to move it to Tshamdra Goenpa, a monastery opposite the river to Dobji Dzong. At the same time, the holy water of Milarepa came along with the statue. The water emerged from a cliff near the Dzong on the next morning of their arrival at Dobji Dzong.