He is a Rishi, of powerful soul, eternal and indestructible. O dear son, Shakra himself is incapable of defeating him in battle.
ऋषिरेष महानात्मा पुराणः शाश्वतोऽक्षरः। नैनं शक्तो हि संग्रामे जेतुं शक्तोऽपि पुत्रक॥