Adhyaya 79 — The Vaivasvata Manvantara: Classes of Devas, the Seven Sages, and Manu’s Nine Sons
ऊर्जस्वी नाम चैवेन्द्रो महात्मा यज्ञभागभुक् ।
अतीतानागताः ये च वर्तन्ते साम्प्रतञ्च ये ॥
ūrjasvī nāma caivendro mahātmā yajña-bhāga-bhuk | atītānāgatā ye ca vartante sāmpratañ ca ye ||
And Indra is named Ūrjasvī—great-souled, a partaker of the sacrificial share. Those Indras who are past, those yet to come, and those who exist in the present as well—
The office of Indra is tied to yajña (sacrificial reciprocity): cosmic prosperity is sustained by offering and lawful exchange, not by mere force.
Manvantara: naming the Indra of a specific age and describing the recurring pattern of Indras is a core manvantara feature.
Ūrjasvī (‘full of energy’) suggests that sovereignty is fundamentally ‘ojas/ūrjā’—vital power disciplined through yajña, i.e., through conscious offering rather than consumption.