Bhagavad Gita · 1.45

यदि मामप्रतीकारमशस्त्रं शस्त्रपाणयः।धार्तराष्ट्रा रणे हन्युस्तन्मे क्षेमतरं भवेत्॥

yadi mām apratīkāram aśhastraṁ śhastra-pāṇayaḥ dhārtarāṣhṭrā raṇe hanyus tan me kṣhemataraṁ bhavet

It would be far better for me if the sons of Dhritarashtra, weapons in hand, were to kill me unarmed and unresisting on the battlefield.

— Bhagavad Gita 1.45

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