Bhagavad Gita Chapter 1 Sloka 15 (1.15)

ಪಾಂಚಜನ್ಯಂ ಹೃಷೀಕೇಶೋ ದೇವದತ್ತಂ ಧನಂಜಯಃ ।
ಪೌಂಡ್ರಂ ದಧ್ಮೌ ಮಹಾಶಂಖಂ ಭೀಮಕರ್ಮಾ ವೃಕೋದರಃ ॥೧೫॥
pāṃcajanyaṃ hṛṣīkeśo devadattaṃ dhanaṃjayaḥ |
pauṃḍraṃ dadhmau mahāśaṃkhaṃ bhīmakarmā vṛkodaraḥ ||15||
Sloka 1:15
Gist of the sloka:
In response, Lord Krishna blew his Panchajanya conch, Arjuna his Devadatta conch and Bheema blew his Proundra conch.
Explanation:
Lord Krishna indicated Pandavas readiness by blowing his conch Panchajanya. Krishna had killed a rakshasha/demon called Panchajanya who used to live in a sea within a conch. The rakshasha had killed Krishna’s teacher [Sandipini] son. His guru had asked return of his son from death as his fee for teaching Krishna.
Arjun while fighting against the rakshas in support of the heavenly beings had been rewarded with the conch called Devadatta.
Bheema [Vykhodara – one who has immense fire in his stomach which can burn the entire world] had a powerful conch called Poundra which he blew. It indicates Bheema’s prowess.
Each of the conch mentioned above were powerful and created earth shaking sounds; bringing fear into the hearts of their enemies.
Lord Krishna is addressed as “Hirishikesha” here. It means one who controls our senses. One who resides in our senses. One who is the master of our senses.
Another meaning also means rays of the Sun. Residing in those rays is the lord of senses, Lord Krishna.