Daśagrīva-boonāvaraṇa, Viṣṇv-avatāra-niyoga, Vānara-sahāya-janana, Mantharā-nirmāṇa
कस्यचित् त्वथ कालस्य व्यास: सत्यवतीसुत:
kasyacit tv atha kālasya vyāsaḥ satyavatīsutaḥ
Vaiśampāyana said: After some time had passed, Vyāsa—the son of Satyavatī—(appeared/arrived), marking a decisive moment when a revered sage intervenes in the course of events.
वैशम्पायन उवाच
The verse foregrounds kāla (time) and the timely appearance of a great ṛṣi: in the Mahābhārata’s ethical world, decisive turns often come when time ripens and authoritative wisdom intervenes to redirect events toward dharma.
The narrator signals a transition: after an interval, Vyāsa—identified by his lineage as Satyavatī’s son—enters the scene, typically to advise, reveal hidden truths, or set in motion a consequential development.