Bhagavad Gita · Chapter 1: Arjuna's Despair

Bhagavad Gita 1.3

paśyaitāṃ pāṇḍuputrāṇāmācārya mahatīṃ camūm | vyūḍhāṃ drupadaputreṇa tava śiṣyeṇa dhīmatā ||

Teacher, look at this great army of the sons of Pandu, arranged for battle by your own gifted student, the son of Drupada.

Modern context

The remark carries a sting: the enemy's formation was designed by Drona's own pupil. Under pressure, people often needle the very allies they depend on. It rarely wins loyalty.