BG 1.34-35

Teachers, fathers, sons, grandfathers, maternal uncles, grandsons, fathers-in-law, grand-nephews, brothers-in-law, and other kinsmen are present here, staking their lives and riches. O Madhusudan, I do not wish to slay them, even if they attack me. If we kill the sons of Dhritarashtra, what satisfaction will we derive from the dominion over the three worlds, what to speak of this Earth?

BG 1.36-37

O Maintainer of all living entities, what pleasure will we derive from killing the sons of Dhritarasthra? Even though they may be aggressors, sin will certainly come upon us if we slay them. Hence, it does not behoove us to kill our own cousins, the sons of Dhritarashtra, and friends. O Madhav (Krishna), how can we hope to be happy by killing our own kinsmen?

BG 1.45-46

Alas! How strange it is that we have set our mind to perform this great sin with horrifying consequences. Driven by the desire for kingly pleasures, we are intent on killing our own kinsmen. It would be better if, with weapons in hand, the sons of Dhritarashtra kill me unarmed and unresisting on the battlefield.