Mahabharata 12.46.26

महाभाग्यं हि भीष्मस्य प्रभावश्च महात्मनःश्रुतं मया कथयतां ब्राह्मणानां महात्मनाम्

mahābhāgyaṃ hi bhīṣmasya prabhāvaśca mahātmanaḥśrutaṃ mayā kathayatāṃ brāhmaṇānāṃ mahātmanām

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