तस्य माताब्रवीद् राजन् वरुण पुत्रकारणात्
tasya mātābravīd rājan varuṇa putrakāraṇāt
Sañjaya said: O King, his mother spoke—because Varuṇa was the cause behind the begetting of that son.
संजय उवाच
The verse foregrounds causality and divine agency in human lineage: births and pivotal events are often narrated as arising from specific causes (kāraṇa), including the involvement of deities like Varuṇa, reminding the listener that personal histories in the epic are intertwined with cosmic forces.
Sañjaya continues reporting to Dhṛtarāṣṭra and introduces a statement made by a mother, explaining that she spoke with reference to Varuṇa as the causal factor connected to the begetting of a son—setting up or clarifying a character’s origin within the ongoing war narrative.