yathoktaṃ bhāṣye nitye tu khalu vai śabde bahukṛtva uccāritaḥ śrutapūrvastvanyānyāsu goṣvanvayavyatirekābhyām ākṛtivacanatvamavagamayati tasmād apinitya iti
As stated in the Bhāṣya: "If the word is eternal, then being uttered many times and having been previously heard in connection with various cows, it reveals through positive and negative concomitance that it denotes the universal form; therefore it must be eternal."