Chapter 11 · verse 12 · gita.yoga.org

Bhagavad Gita 11.12

दिवि सूर्यसहस्रस्य भवेद्युगपदुत्थिता। यदि भाः सदृशी सा स्याद्भासस्तस्य महात्मनः

If the splendour of a thousand suns were to blaze out simultaneously in the sky, that would be the splendour of that mighty being.