A class on Bhagavad Gita 1.13-14 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on July 14, 1973 in London.
Bhagavad Gita 1.13
tataḥ śaṅkhāś ca bheryaś ca
paṇavānaka-gomukhāḥ
sahasaivābhyahanyanta
sa śabdas tumulo ’bhavat
After that, the conchshells, drums, bugles, trumpets and horns were all suddenly sounded, and the combined sound was tumultuous.
Bhagavad Gita 1.14
tataḥ śvetair hayair yukte
mahati syandane sthitau
mādhavaḥ pāṇḍavaś caiva
divyau śaṅkhau pradadhmatuḥ
On the other side, both Lord Kṛṣṇa and Arjuna, stationed on a great chariot drawn by white horses, sounded their transcendental conchshells.