Bhagavad Gita 1.14 Chapter 1, Verse 14

ततः श्वेतैर्हयैर्युक्ते महति स्यन्दने स्थितौ ।
माधवः पाण्डवश्चैव दिव्यौ शङ्खौ प्रदध्मतुः ॥१.१४॥

tataḥ śvetairhayairyukte mahati syandane sthitau
mādhavaḥ pāṇḍavaścaiva divyau śaṅkhau pradadhmatuḥ

Meaning

Then Krishna and Arjuna, seated in their great chariot yoked to white horses, blew their divine conches.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 1.14 (Chapter 1, Arjuna's Despair (Arjuna Vishada Yoga), Verse 14)