an Entity references as follows:
Longchen Nyingthig (Tibetan: ཀློང་ཆེན་སྙིང་ཐིག་, Wylie: klong chen snying thig) is a terma, revealed scripture, of the Nyingma school of Tibetan Buddhism, which gives a systematic explanation of Dzogchen. It was revealed by Jigme Lingpa (1730–1798).