Bhagavad Gita 15.12

यदादित्यगतं तेजो जगभासयतेऽखिलम् |
यच्चन्द्रमसि यच्चाग्नौ तत्तेजो विद्धि मामकम्

Translation

Know that I am like the brilliance of the sun that illuminates the entire solar system. The radiance of the moon and the brightness of the fire also come from Me.