The 8th century Pātañjalayogaśāstravivaraṇa (Sub-commentary on Patanjali's Yoga Commentary), also called the Yogasūtrabhāṣyavivaraṇa (Sub-commentary on the Commentary on the Yoga Sutras) is Ādi Śaṅkara's commentary on Patanjali's own commentary, the bhāṣya, on his Yoga Sutras.
As well as remarking briefly on each sutra, it gives descriptions of the 12 seated asanas named in the bhāṣya, including Dandasana, Svastikasana, and Virasana.
The text was rediscovered in the 20th century, published in Madras in 1952, and partly translated into English by Trevor Leggett (Book 1 in 1961, Book 2 in 1983), completed in 1990. The full translation of all four books by T. S. Rukmani was published in 2001. The ascription of authorship to Śaṅkara has been debated.
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