Chapter 18 · Liberation through Renunciation · Krishna said
Bhagavad Gita 18.67 — Who should not hear
इदं ते नातपस्काय नाभक्ताय कदाचन। न चाशुश्रूषवे वाच्यं न च मां योऽभ्यसूयति ॥
idaṃ te nātapaskāya nābhaktāya kadācana | na cāśuśrūṣave vācyaṃ na ca māṃ yo'bhyasūyati ||
Meaning
This teaching should never be told to one who has no self-discipline, no devotion, no wish to listen, or who finds fault with Me.