Bhagavad Gita Chapter 18, Verse 66

सर्वधर्मान्परित्यज्य मामेकं शरणं व्रज | अहं त्वां सर्वपापेभ्यो मोक्षयिष्यामि मा शुचः ||

sarvadharmān parityajya mām ekaṁ śaraṇaṁ vraja ahaṁ tvāṁ sarvapāpebhyo mokṣayiṣyāmi mā śucaḥ

Abandoning all dharmas, take refuge in Me alone. I will liberate you from all sins. Do not grieve.

Krishna gives the ultimate instruction—the most famous verse of the Gita. 'Sarvadharmān parityajya mām ekaṁ śaraṇaṁ vraja'—having abandoned (parityajya) all dharmas (sarva-dharmān), take refuge (śaraṇam vraja) in Me alone (mām ekam). 'Ahaṁ tvāṁ sarvapāpebhyo mokṣayiṣyāmi mā śucaḥ'—I (aham) will liberate (mokṣayiṣyāmi) you (tvām) from all sins (sarva-pāpebhyaḥ). Do not grieve (mā śucaḥ). This is the ultimate teaching: abandon all dharmas (all duties, all paths, all methods) and take complete refuge in Krishna alone. When you do this, He will liberate you from all sins. This doesn't mean abandoning your duties in action—it means abandoning attachment to dharmas and taking refuge in the Supreme. This is the path of complete surrender: abandon all dharmas as refuge, take refuge in Krishna alone, and He will liberate you. Do not grieve—this is the assurance.