Mahabharata 3.198.81

शुभानामशुभानां च कर्मणां फलसंचयेविपाकमभिजानन्ति ते शिष्टाः शिष्टसंमताः

śubhānāmaśubhānāṃ ca karmaṇāṃ phalasaṃcayevipākamabhijānanti te śiṣṭāḥ śiṣṭasaṃmatāḥ

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