Mahabharata 3.21.37

3.21.37

tato nājñāyata tadā divārātraṃ tathā diśaḥ |
tato'haṃ mohamāpannaḥ prajñāstraṃ samayojayam |
tatastadastramastreṇa vidhūtaṃ śaratūlavat || 37 ||

And, becoming bewildered, I fixed on my bowstring the weapon called Pragnastra. And, O son of Kunti, the weapon went like unto flakes of pure cotton blown away by the winds! And a great fight took place, calculated to make the down on one's body stand on end. And O best of monarchs, having regained, light, I again fought with the enemy!'"