Mahabharata 3.203.50

परित्यजति यो दुःखं सुखं चाप्युभयं नरःब्रह्म प्राप्नोति सोऽत्यन्तमसङ्गेन च गच्छति

parityajati yo duḥkhaṃ sukhaṃ cāpyubhayaṃ naraḥbrahma prāpnoti so'tyantamasaṅgena ca gacchati

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