Bhagavad Gita · 18.62

तमेव शरणं गच्छ सर्वभावेन भारत।तत्प्रसादात्परां शान्तिं स्थानं प्राप्स्यसि शाश्वतम्॥

tam eva śharaṇaṁ gachchha sarva-bhāvena bhārata tat-prasādāt parāṁ śhāntiṁ sthānaṁ prāpsyasi śhāśhvatam

Take refuge in Him alone with your whole being, O Bharata. By His grace you shall attain supreme peace and the eternal abode.

— Bhagavad Gita 18.62

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