Bhagavad Gita · 18.64

सर्वगुह्यतमं भूयः शृणु मे परमं वचः।इष्टोऽसि मे दृढमिति ततो वक्ष्यामि ते हितम्॥

sarva-guhyatamaṁ bhūyaḥ śhṛṇu me paramaṁ vachaḥ iṣhṭo 'si me dṛḍham iti tato vakṣhyāmi te hitam

Hear again My supreme word, the most secret of all. You are very dear to Me, therefore I shall tell you what is for your benefit.

— Bhagavad Gita 18.64

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