ཧཱུྂ༔རིག་སྟོང་ཆོས་ཉིད་མངོན་སུམ་དབྱིངས༔
Hūṃ. Within empty awareness the all-encompassing space of reality is directly realized
Guru Sādhana, Longchen Nyingtik, Tiklé Gyachen, Khyentse Kabab, Rinchen Terdzö, Tibetan Masters, Jigme Lingpa, Longchen Rabjam