The incessant shower of arrows from the enemy gave Dhruva Maharaja new vigor to defeat them. In other words, whatever incompetency he might have had was washed away

Expressions researched:
"Similarly, the incessant shower of arrows from the enemy gave Dhruva Mahārāja new vigor to defeat them. In other words, whatever incompetency he might have had was washed away"

Srimad-Bhagavatam

SB Canto 4

The example of a mountain peak's being covered by incessant rain is just suitable, for when a mountain is covered by incessant rain, all dirty things are washed from the body of the mountain. Similarly, the incessant shower of arrows from the enemy gave Dhruva Mahārāja new vigor to defeat them. In other words, whatever incompetency he might have had was washed away.

SB 4.10.13, Translation and Purport

Dhruva Mahārāja was completely covered by an incessant shower of weapons, just as a mountain is covered by incessant rainfall.

Śrīla Viśvanātha Cakravartī Ṭhākura points out in this connection that although Dhruva Mahārāja was covered by the incessant arrows of the enemy, this does not mean that he succumbed in the battle. The example of a mountain peak's being covered by incessant rain is just suitable, for when a mountain is covered by incessant rain, all dirty things are washed from the body of the mountain. Similarly, the incessant shower of arrows from the enemy gave Dhruva Mahārāja new vigor to defeat them. In other words, whatever incompetency he might have had was washed away.