Bhagavad Gita · 11.32

श्रीभगवानुवाचकालोऽस्मि लोकक्षयकृत्प्रवृद्धोलोकान्समाहर्तुमिह प्रवृत्तः।ऋतेऽपि त्वां न भविष्यन्ति सर्वेयेऽवस्थिताः प्रत्यनीकेषु योधाः॥

śhrī bhagavān uvācha kālo 'smi loka-kṣhaya-kṛt pravṛddho lokān samāhartum iha pravṛttaḥ ṛte 'pi tvāṁ na bhaviṣhyanti sarve ye 'vasthitāḥ pratyanīkeṣhu yodhāḥ

The Supreme Lord said: I am mighty Time, the destroyer of worlds, engaged here in annihilating all beings. Even without your participation, all the warriors standing in the opposing armies shall cease to exist.

— Bhagavad Gita 11.32

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