Bhagavad Gita Chapter 1.15
pāñcajanyaḿ hṛṣīkeśo
devadattaḿ dhanañjayaḥ
pauṇḍraḿ dadhmau mahā-śańkhaḿ
bhīma-karmā vṛkodaraḥ
Translation
Lord Krishna blew His conchshell, called Pancajanya; Arjuna blew his, the Devadatta; and Bhima, the voracious eater and performer of herculean tasks, blew his terrific conchshell, called Paundra.