Divisions Sama vedic Yajur vedic Atharva vedic Vaishnava puranas Shaiva puranas Shakta puranas Prasthanatrayi (Sanskrit: प्रस्थानत्रयी, IAST: Prasthānatrayī), literally, three sources (or axioms), refers to the three canonical texts of theology having epistemic authority, especially of the Vedanta schools.
The ten Upanishads are Īśā, Kena, Kaṭha, Praṣna, Muṇḍaka, Māṇḍūkya, Taittirīya, Aitareya, Chāndogya and Bṛhadāraṇyaka.
[citation needed] The Bhagavad Gītā is part of the Bhishma Parva of the Mahabhārata.
Founders of the major schools of Vedanta, Adi Shankara, Madhvācharya wrote bhāṣyas (commentaries) on these texts.
In the Ramanuja lineage, one of his followers, Rangaramanuja, wrote commentaries on almost all of the Principal Upanishads around the 1600s.