གྲགས་སྟོང་གསུང་དང་དྲན་རྟོག་ཐུགས༔
Empty sounds the enlightened speech and thoughts the enlightened mind.
Sādhanas, Karling Zhitro, Termas, Peaceful and Wrathful Deities, Tibetan Masters, Dodrupchen Jigme Trinle Özer, Karma Lingpa