Mahabharata 3.178.24

युधिष्ठिर उवाच · yudhiṣṭhira uvāca

मनसश्चापि बुद्धेश्च ब्रूहि मे लक्षणं परम्एतदध्यात्मविदुषां परं कार्यं विधीयते

manasaścāpi buddheśca brūhi me lakṣaṇaṃ parametadadhyātmaviduṣāṃ paraṃ kāryaṃ vidhīyate

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