Bhishma said Seeing his son Shuka living fearlessly as ordinary men do in practices that are regarded innocent by them, Vyasa taught him the entire Vedas and then discoursed to him one day in following manner.
भीष्म उवाच प्राकृतेन सुवृत्तेन चरन्तमकुतोभयम्। अध्याप्य कृस्त्नं स्वाध्यायमन्वशाद् वै पिता सुतम्॥