Vyākaraṇa-saṅgraha: Pada–Vibhakti–Kāraka–Lakāra–Samāsa
न कर्तृकर्मणोः षष्टी निष्टादिप्रतिपादिका । एता वै द्विविधा ज्ञेयाः सुबादिषु विभक्तिषु । भूवादिषु तिङतेषु लकारा दश वै स्मृताः ॥ १७ ॥
na kartṛkarmaṇoḥ ṣaṣṭī niṣṭādipratipādikā | etā vai dvividhā jñeyāḥ subādiṣu vibhaktiṣu | bhūvādiṣu tiṅateṣu lakārā daśa vai smṛtāḥ || 17 ||
The sixth case-ending (ṣaṣṭhī, genitive) is not intended to denote the agent and the object; rather, it conveys participial senses such as those expressed by niṣṭā and the like. Thus, among the nominal inflections beginning with su, these case-endings are to be understood as of two kinds. And in the verbal system—among tiṅ-endings based on roots such as bhū—ten lākāras (tense/mood markers) are traditionally remembered.
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It frames Vedāṅga Vyākaraṇa as a disciplined tool for right understanding of śāstra: precise meanings of cases and verb-forms prevent misreading Dharma and Mokṣa teachings.
Indirectly: by emphasizing correct linguistic interpretation, it safeguards accurate comprehension of bhakti-oriented scriptures and mantras, ensuring devotion rests on proper meaning rather than confusion of grammatical relations.
Vyākaraṇa basics: (1) the function of the ṣaṣṭī (genitive) and its interpretive scope, including participial/derivative senses like niṣṭā, and (2) the standard count of ten lākāras used with tiṅ verb-endings.