Bhagvad-Gita Chapter one SLoka 3

HARE KRISHNA!
SLOKA 1/3
pashyaitam  panduputram  acharya  mahtim  chamum

vyudham dhrupod-putrena tava shishyen dhimta.

meaning

O my teacher, behold the great army of the sons of Pandu, so expertly arranged by your intelligent disciple the son of Drupada.

explanation

Here Duryodhana is pointing out the mistake of Dronacharya. Dronacharya had some political conflict with King Drupada, the father in law of Pandavas, so Drupada Performed a great yagna by which he received a son Dhrashtadhyumna as a blessing who would be able to kill Dronacharya. Dronacharya knew this perfectly and yet as a liberal he imparted all his military secrets when Drupada entrusted him to teach his son Dhrashtadhyumna. In the battle of Mahabharta Dhrashtadhyumna took the side of pandavas and it was he who arranged for their military phalanx after having learned the art from Dronacharya. That is why here Duryodhana pointed out the mistake of teaching him strategy of war also he was trying to make sure that Drona would not not lenient in battle against the pandavas who were also Dronacharya affectionate students. Arjuna especially was his most affectionate and brilliant student. Duryodhana alsowanrned that such leniency in the fight would lead to defeat.

HARI BOL!