Bhagavad Gita 1.14
ततः श्वेतैर्हयैर्युक्ते महति स्यन्दने स्थितौ। माधवः पाण्डवश्चैव दिव्यौ शङ्खौ प्रदध्मतुः।।1.14।।
tataḥ śvetairhayairyukte mahati syandane sthitau| mādhavaḥ pāṇḍavaścaiva divyau śaṅkhau pradadhmatuḥ||1.14||
tatah shvetairhayairyukte mahati syandane sthitau madhavah pandavashcaiva divyau shankhau pradadhmatuh1.14
Meaning
Then, seated in their magnificent chariot yoked with white horses, Krishna and Arjuna also sounded their divine conches.
तत्पश्चात् श्वेत घोड़ों से जुते हुए भव्य रथ पर विराजमान श्रीकृष्ण और अर्जुन ने भी अपने-अपने दिव्य शंख बजाए।
This is verse 14 of 47 in Chapter 1 (Arjuna Vishada Yoga) of the Bhagavad Gita.