avaśyaṃ saiva dharmārthibhiḥ puruṣaiḥ prekṣāvadbhiḥ pramāṇatvenāśrayaṇīyā nānyatpuruṣapraṇītavacanādikam.
It [i.e., the Veda] alone must necessarily be accepted as authoritative by intelligent persons who seek dharma, not other utterances and such composed by [ordinary] humans.