18.65 I promise you truly Krishna speaks

मन्मना भव मद्भक्तो मद्याजी मां नमस्कुरु
मामेवैष्यसि सत्यं ते प्रतिजाने प्रियोऽसि मे

man-manā bhava mad-bhakto mad-yājī māṁ namaskuru
mām evaiṣhyasi satyaṁ te pratijāne priyo ‘si me

Fix your mind on me, be devoted to me, make your offering to me, bow to me. I promise you truly, for you are dear to me: you will come to me.

Explanation

I promise you truly.

Fix your mind, be devoted, offer, bow — satyaṁ te pratijāne, I promise you truly, for you are dear to me.

Word for word the instruction that closed chapter 9, now with a promise attached. The only place in the book where he swears to something.