पर्वोक्तं भगवद्गीता पर्व भीष्म वधस्ततः
द्रोणाभिषेकः पर्वोक्तं संशप्तक वदस्ततः
parvOktam bhagavadgeetaa parva bheeshma vadhastataH
drONaabhishekaH parvOktam samshaptaka vadastataH
Shloka Meaning:
This parva has the Bhagavadgeeta and Bheeshma being laid down
Drona being given the army chief and being killed due to an oath are in that parva
This is Shloka No 56 of Adiparva from Sriman Vyaasa Mahabharata. This is where one will see the word "Bhagavadgeetha" in the entire epic. Even in the Bheeshma parva where the actual Bhagavadgeeta is wonderfully knitted in, it is portrayed more like the greatest mentor and a normal mentee session