BG 18.67
इदं ते नातपस्काय नाभक्ताय कदाचन ।
न चाशुश्रूषवे वाच्यं न च मां योऽभ्यसूयति ॥
न चाशुश्रूषवे वाच्यं न च मां योऽभ्यसूयति ॥
idaṁ te nātapaskāya nābhaktāya kadācana
na cāśuśrūṣave vācyaṁ na ca māṁ yo ’bhyasūyati
na cāśuśrūṣave vācyaṁ na ca māṁ yo ’bhyasūyati
Word-for-word meanings
idam — this [confidential knowledge]; na vācyam — is not to be revealed; te — by you; kadācana — at any time; na — neither; atapaskāya — to one who is not prepared to undergo spiritual discipline; na — nor; abhaktāya — to one who is devoid of devotion; na — nor; ca — also; aśuśrūṣave — to one who is not whole-heartedly inquisitive; ca — and; yaḥ — [not to one] who; abhyasūyati — is envious; mām — toward Me.
Translation
This confidential knowledge should never be revealed by you to a person who is not prepared to undergo spiritual discipline, or to one who is devoid of devotion, or to one who is not whole-heartedly inquisitive, or to one who is envious of Me.