and the Brahma Sutras are the foundational scriptures in Vedanta. All traditions of Vedanta give a specific exegesis of these texts, collectively called the Prasthanatrayi, literally, three sources.

# The Upanishads, or Sruti prasthana; considered the Sruti, the "heard" (and repeated) foundation of Vedanta.
# The Brahma Sutras, or Nyaya prasthana / Yukti prasthana; considered the reason-based foundation of Vedanta.
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