BG 1.37
तस्मान्नार्हा वयं हन्तुं धार्तराष्ट्रान्स्वबान्धवान्
स्वजनं हि कथं हत्वा सुखिनः स्याम माधव
tasmānnārhā vayaṃ hantuṃ dhārtarāṣṭrānsvabāndhavān
svajanaṃ hi kathaṃ hatvā sukhinaḥ syāma mādhava
TRANSLATION
Therefore, it is not befitting that we slay our kin, the sons of Dhrtarashtra. For if we kill our kinsmen, O Krishna, how indeed can we be happy?