sādhana
NPra 2: tatra pakṣādivacanāni sādhanam / pakṣahetudṛṣṭāntavacanair hi prāśnikānām apratīto 'rthaḥ pratipādyata iti //
NPra 2. 4: eṣāṃ vacanāni parapratyāyanakāle sādhanam / tadyathā / anityaḥ śabda iti pakṣavacanam / yat kṛtakaṃ tad anityaṃ dṛṣṭaṃ yathā ghaṭādir iti sapakṣānugamavacanam / yan nityaṃ tad akṛtakaṃ dṛṣṭaṃ yathākāśam iti vyatirekavacanam //
HTU 2: sādhyate yena tat sādhanam / |