Mahabharata 12.224.60

द्वे ब्रह्मणी वेदितव्ये शब्दब्रह्म परं च यत्शब्दब्रह्मणि निष्णातः परं ब्रह्माधिगच्छति

dve brahmaṇī veditavye śabdabrahma paraṃ ca yatśabdabrahmaṇi niṣṇātaḥ paraṃ brahmādhigacchati

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