BG 18.64
सर्वगुह्यतमं भूयः श्रृणु मे परमं वचः।इष्टोऽसि मे दृढमिति ततो वक्ष्यामि ते हितम्
sarva-guhyatamaṁ bhūyaḥ śhṛiṇu me paramaṁ vachaḥ iṣhṭo ‘si me dṛiḍham iti tato vakṣhyāmi te hitam
Listen to My last word once more, the deepest secret of all; you are My beloved, you are My friend, and I speak for your welfare.
Translated by Shri Purohit Swami
Hear again My supreme word, most secret of all; for you are dearly beloved of Me, I will tell you what is good.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
sarva-guhya-tamam—the most confidential of all; bhūyaḥ—again; śhṛiṇu—hear; me—by me; paramam—supreme; vachaḥ—instruction; iṣhṭaḥ asi—you are dear; me—to me; dṛiḍham—very; iti—thus; tataḥ—because; vakṣhyāmi—I am speaking; te—for your; hitam—benefit