Bhagavad Gita 15.20
इति गुह्यतमं शास्त्रमिदमुक्तं मायान्घ |
एतद्बुद्ध्वा बुद्धिस्यत्कृतकृत्यश्च भारत
Translation
I have shared this most secret principle of the Vedic scriptures with you, O sinless Arjun. By understanding this, a person becomes enlightened, and fulfills all that is to be accomplished.