Droṇa-parva Adhyāya 125: Duryodhana’s despair and vow after Jayadratha’s fall (जयद्रथवधे दुर्योधनविलापः)
हत्वा पञज्चशतान् योधान् शरैराशीविषोपमै:
hatvā pañcaśatān yodhān śarair āśīviṣopamaiḥ
सञ्जय उवाच—पञ्चशतान् योधान् शरैराशीविषोपमैर्हत्वा स रणभूमिं पतितैः समाकीर्णां चकार।
संजय उवाच
The verse underscores the terrifying efficiency of martial skill: weapons can act with the suddenness and inevitability of poison. In the Mahābhārata’s ethical frame, such prowess is not celebrated without remainder; it intensifies the tension between kṣatriya-duty in war and the human cost that accrues as karmic and moral burden.
Sañjaya reports a moment of extreme slaughter on the battlefield: a single combatant (implied by context) kills five hundred warriors using arrows described as ‘like venomous serpents,’ emphasizing speed, deadliness, and the panic such an assault creates among troops.