Arjuna Viṣāda Yoga · Verse 15
"पाञ्चजन्यं हृषीकेशो देवदत्तं धनञ्जयः | पौण्ड्रं दध्मौ महाशङ्खं भीमकर्मा वृकोदरः"
"pāñcajanyaṃ hṛṣīkeśo devadattaṃ dhanañjayaḥ | pauṇḍraṃ dadhmau mahā-śaṅkhaṃ bhīma-karmā vṛkodaraḥ"
Hṛṣīkeśa blew the Pāñcajanya, Dhanañjaya the Devadatta; and Vṛkodara, performer of terrible deeds, sounded the great conchshell Pauṇḍra
Each name and conchshell has profound meaning. Hṛṣīkeśa (Lord of the senses) is Kṛṣṇa; his Pāñcajanya comes from the demon Pañcajana whom he killed. Controller of senses, his sound represents inner mastery.
Dhanañjaya (Conqueror of wealth) is Arjuna; his Devadatta (God-given) was given to him by Indra. Vṛkodara (Wolf-bellied) is Bhīma, whose Pauṇḍra (the large, the stout) reflects his prodigious physical nature. Bhīma-karmā describes someone whose actions (karman) inspire fear (bhīma).
The three brothers — Kṛṣṇa as guide, Arjuna as balance, Bhīma as force — create a harmonious triangle.