Bhagavad Gita · 2.6

न चैतद्विद्मः कतरन्नो गरीयोयद्वा जयेम यदि वा नो जयेयुः।यानेव हत्वा न जिजीविषाम-स्तेऽवस्थिताः प्रमुखे धार्तराष्ट्राः॥

na chaitad vidmaḥ kataran no garīyo yad vā jayema yadi vā no jayeyuḥ yān eva hatvā na jijīviṣhāmas te 'vasthitāḥ pramukhe dhārtarāṣhṭrāḥ

I do not know which is better — that we should conquer them or that they should conquer us. The sons of Dhritarashtra, whom if we killed we would not wish to live, stand before us.

— Bhagavad Gita 2.6

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)