निहत्य धार्तराष्ट्रान्नः का प्रीतिः स्याज्जनार्दन।
1.36. Nothing but sin would slay these desperadoes and take hold of us. Therefore we should not slay Dhrtarastras sons, our own relatives.
1.35 1.44 Nihatya etc. upto anususruma. Sin alone is the agent in the act of slaying these desperadoes. Therefore here the idea is this : These ememies of ours have been slain, i.e., have been take possession of, by sin. Sin would come to us also after slaying them. Sin in this context is the disregard, on account of greed etc., to the injurious conseences like the ruination of the family and the like. That is why Arjuna makes a specific mention of the [ruin of the] family etc., and of its duties in the passage How by slaying my own kinsmen etc. The act of slaying, undertaken with an individualizing idea about its result, and with a particularizing idea about the person to be slain, is a great sin. To say this very thing precisely and to indicate the intensity of his own agony, Arjuna says only to himself [see next sloka]:
Nihatya dhaartaraashtraan nah kaa preetih syaaj janaardana; Paapam evaashrayed asmaan hatwaitaan aatataayinah.
nihatya—by killing; dhārtarāṣhṭrān—the sons of Dhritarashtra; naḥ—our; kā—what; prītiḥ—pleasure; syāt—will there be; janārdana—he who looks after the public, Shree Krishna; pāpam—vices; eva—certainly; āśhrayet—must come upon; asmān—us; hatvā—by killing; etān—all these; ātatāyinaḥ—aggressors; tasmāt—hence; na—never; arhāḥ—behoove; vayam—we; hantum—to kill; dhārtarāṣhṭrān—the sons of Dhritarashtra; sva-bāndhavān—along with friends; sva-janam—kinsmen; hi—certainly; katham—how; hatvā—by killing; sukhinaḥ—happy; syāma—will we become; mādhava—Shree Krishna, the husband of Yogmaya