Revelation from memory
Revelation from memory or jé dren (Tib. རྗེས་དྲན་, Wyl. rjes dran) is a type of terma revelation and one of the seven authoritative transmissions. The tertön remembers the teaching received in a past life and writes it down.
Chetsun Nyingtik, the famous Dzogchen cycle, is a terma that was revealed through recollection. As Jamyang Khyentse Wangpo travelled on horseback through Uyuk in Tsang, he remembered everything about his previous life as Chetsün Senge Wangchuk, then wrote it all down. From these remembered revelations, he revealed the instructions Vimalamitra gave to Chetsün Senge Wangchuk, which are now known as the Chetsun Nyingtik.