Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 23
Sanskrit:
हुत्वाग्निं समुपासीनं ददृशु: शक्रकिङ्करा: ।मीलिताक्षं दुराधर्षं मूर्तिमन्तमिवानलम् ॥ २३ ॥
ITRANS:
hutvāgniṁ samupāsīnaṁdadṛśuḥ śakra-kiṅkarāḥmīlitākṣaṁ durādharṣaṁmūrtimantam ivānalam
Translation:
These servants of Indra found the sage sitting in meditation, having just offered his prescribed oblations into the sacrificial fire. His eyes closed in trance, he seemed invincible, like fire personified.