Mahabharata 12.318.46

भीष्म उवाच · bhīṣma uvāca

नारदस्य वचः श्रुत्वा शुकः परमबुद्धिमान्संचिन्त्य मनसा धीरो निश्चयं नाध्यगच्छत

nāradasya vacaḥ śrutvā śukaḥ paramabuddhimānsaṃcintya manasā dhīro niścayaṃ nādhyagacchata

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