Nyen yik (Tib. བསྙེན་ཡིག་, Wyl. bsnyen yig) — a retreat instruction text or sadhana manual. Nyen yik gives a practitioner all the information and instructions necessary to carry out traditional and strict personal retreat.
Nyen yik covers many points such as how to arrange the shrine, prepare the retreat house, how to carry out the practice on a daily basis, the duration of each phase of the practice, how to conclude the retreat and what signs might occur.
- Presentation of the Vajrakilaya Pudri Rekpung Retreat Instructions, by Gyurme Tenpa Gyaltsen aka the Fourth Katok Getse Rinpoche, available at Vimala Treasures.