Bhagavad Gita 18.67

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 ||

Never speak this to one who is devoid of austerities or devotion, who does not render service, who does not desire to listen, or who cavils at Me.

Do not speak this to one who has not practiced austerities, or to one who does not love, or who will not listen, or who mocks.

Our plain-language meaning of this verse is waiting for scholar review.