Bhagavad Gita Chapter 18, Verse 63

इति ते ज्ञानमाख्यातं गुह्याद्गुह्यतरं मया | विमृश्यैतदशेषेण यथेच्छसि तथा कुरु ||

iti te jñānam ākhyātaṁ guhyād guhyataraṁ mayā vimṛśyaitad aśeṣeṇa yathechasi tathā kuru

Thus, the most secret knowledge has been told to you by Me. Having reflected on this completely, act as you wish.

Krishna concludes the secret teaching. 'Iti te jñānam ākhyātaṁ guhyād guhyataraṁ mayā'—thus (iti), the most secret knowledge (guhyāt guhyataraṁ jñānam) has been told (ākhyātam) to you (te) by Me (mayā). 'Vimṛśyaitad aśeṣeṇa yathechasi tathā kuru'—having reflected (vimṛśya) on this (etat) completely (aśeṣeṇa), act (kuru) as you wish (yathā icchasi tathā). This is the conclusion of the secret teaching: Krishna has revealed the most secret knowledge—the complete teaching of the Gita. He asks Arjuna to reflect on it completely and then act as he wishes. This is the final instruction: reflect deeply on the teaching, understand it completely, and then act according to your understanding. The teaching is complete—now it's up to Arjuna to reflect and act.