Adhyāya 5 (Śānti-parva): Nārada’s account of Karṇa—Jarāsandha encounter and the causal grounds of Karṇa’s fall
रुद्रस्य देवराजस्य यमस्य वरुणस्य च । कुबेरद्रोणयोश्वैव कृपस्थ च महात्मन:
rudrasya devarājasya yamasya varuṇasya ca | kuberadroṇayoś caiva kṛpasya ca mahātmanaḥ ||
那罗陀说道:持甘狄婆弓的阿周那,已得鲁陀罗、天帝因陀罗、阎摩、伐楼那、俱毗罗所赐之神兵,又得德罗纳与大魂克利帕所授之天界飞矢。故而在战场上,他得以诛杀迦尔纳——毗迦尔塔那,太阳之子,光辉炽盛如日轮。
नारद उवाच
Power in war is not merely personal strength; it is also the fruit of rightful training, divine sanction, and the disciplined acquisition of knowledge (astras) from worthy sources. When such power is employed in accordance with one’s kṣatriya-duty, it becomes decisive—yet it also implies ethical responsibility for how that power is used.
Nārada explains that Arjuna had received divine missiles from major deities and from his teachers Droṇa and Kṛpa. Because of this arsenal and training, Arjuna could overcome and kill Karṇa, who is described as sun-like in brilliance.