Abiding in the Retreat by Lama Zopa Rinpoche. One of the Chenrezig practices in Tibetan Buddhism is the Chenrezig practices is the nyung n?. It is a powerful and intensive practice that takes place during a two days retreat. This book Abiding in the Retreat is a commentary to a nyung n? sadhana composed by Kelzang Gyatso, the Seventh Dalai Lama, according to the nyung n? lineage originating from Bhikshuni Lakshmi (Gelongma P?lmo), an Indian princess who cured herself of leprosy and achieved enlightenment through nyung n? practice.