Chapter 1 · Arjuna's Despair · Sanjaya said
Bhagavad Gita 1.13 — The sound of war
ततः शङ्खाश्च भेर्यश्च पणवानकगोमुखाः। सहसैवाभ्यहन्यन्त स शब्दस्तुमुलोऽभवत् ॥
tataḥ śaṅkhāśca bheryaśca paṇavānakagomukhāḥ | sahasaivābhyahanyanta sa śabdastumulo'bhavat ||
Meaning
Then conches, kettledrums, tabors, drums and horns all sounded at once, and the noise was tremendous.