KāSū, 4, 1, 22.1 durvyāhṛtaṃ durnirīkṣitam anyato mantraṇaṃ dvāradeśāvasthānaṃ nirīkṣaṇaṃ vā niṣkuṭeṣu mantraṇaṃ vivikteṣu ciram avasthānam iti varjayet //