Brahma Sutra 1.4.1

If it be said that in some (recensions of the Vedas ) that which is inferred (i.e. the Pradhana) (is) also (mentioned), (we say) no, because (the word ‘Avyakta’ occurring in the Katha Upanishad ) is mentioned in a simile referring to the body (and means the body itself and not the Pradhana of the Sankhyas ); (the Sruti) too explains (it).