Gita Chapter 1.11 to 1.15

Ayaneshu cha sarveshu yathaabhaagam avasthitaah;
Bheeshmam evaabhirakshantu bhavantah sarva eva hi.
11. “Therefore, do ye all, stationed in your respective positions in the several divisions of the army, protect Bhishma alone”.

Tasya sanjanayan harsham kuruvriddhah pitaamahah;
Simhanaadam vinadyocchaih shankham dadhmau prataapavaan.
12. His glorious grandsire (Bhishma), the eldest of the Kauravas, in order to cheer Duryodhana, now roared like a lion and blew his conch.

Tatah shankhaashcha bheryashcha panavaanakagomukhaah;
Sahasaivaabhyahanyanta sa shabdastumulo’bhavat.
13. Then (following Bhishma), conches and kettle-drums, tabors, drums and cow-hornsblared forth quite suddenly (from the side of the Kauravas); and the sound was tremendous.

Tatah shvetair hayair yukte mahati syandane sthitau;
Maadhavah paandavashchaiva divyau shankhau pradadhmatuh.
14. Then also, Madhava (Krishna), and the son of Pandu (Arjuna), seated in their magnificent chariot yoked with white horses, blew their divine conches.

Paanchajanyam hrisheekesho devadattam dhananjayah;
Paundram dadhmau mahaashankham bheemakarmaa vrikodarah.
15. Hrishikesa blew the “Panchajanya” and Arjuna blew the “Devadatta”, and Bhima, the doer of terrible deeds, blew the great conch, “Paundra”.