The gsang 'dus 'grel pa bzhi sbrags/ refers to a collection of four commentarial works on the Guhyasamājatantra, including Candrakīrtipāda's Pradīpoddyotana ('grel pa sgron gsal), Tsong kha pa's interlinear commentary on it ('grel pa sgron gsal yang 'grel), his topical outline (sa bcad bsdus don) and analysis (mtha' dpyod rin po che'i myu gu). Ⓢ