This is what Krishna said about his own strength
"Gods, danavas, gandharvas, men, birds and serpents together are not equal to one-hundredth part of my valour. I possess this bow, this spear, this cakra and this club. I will give you whichever of these weapons you cherish.
- 12, Aishika parva, Mahabharata.
The Kaurava army was in terror seeing Krishna advance against Bhishma
Krishna’s eyes were coppery red with anger. The infinitely radiant one wished to kill him. In the great battle, those on your side lost their senses. They saw Madhava advance against Bhishma in that battle, as if he would swallow him up. ‘Bhishma has been slain. Bhishma has been slain.’ Such lamentations were uttered by the soldiers. All the men were frightened at the sight of Vasudeva advancing.
- 102, Bhishma Vadha parva, Mahabharata.
Krishna had subjucated all the kings in battle
Madhusudana defeated the nishada Ekalavya, Kalingas, Magadhas, Gandharas, the king of Kashi, kings from the desert regions and kings from the east, the south and the mountainous regions. Why did he disregard what was going to happen?
- 7, Mausala parva, Mahabharata.
All the worlds are under Krishna's subjucation
The firmament, the moon, the sun, the nakshatras, the directions, the earth and the great ocean—all these are pervaded with the great-souled Vasudeva’s valour. The gods, the asuras, the gandharvas, the yakshas, the serpents, the rakshasas and everything mobile and immobile in the universe—all these are under Krishna’s subjugation.
- 136, Dana Dharma parva, Mahabharata.