BG 1.14-15: Then, from amidst the Pandava army, seated in a glorious chariot drawn by white horses, Madhav and Arjun blew their Divine conch shells.
Hrishikesh blew his conch shell, called Panchajanya, and Arjun blew the Devadutta. Bheem, the voracious eater and performer of herculean tasks, blew his mighty conch, called Paundra.
Commentary
The uproar of the Kaurava army had started to wane. Then from the Pandava side, seated on a magnificent chariot the Supreme Lord Shree Krishna and Arjun, both blew their conch shells intrepidly, which ignited the enthusiasm of the Pandava army as well.
Here, Sanjay has addressed Lord Shree Krishna as "Madhav". It is a combination of two words, Mā which refers to goddess Lakshmi, the goddess of prosperity and dhav is used for husband. Goddess Lakshmi is Lord Vishnu's wife, who is one of the many forms of Shree Krishna. This verse implies that the goddess of prosperity was with the Pandavas, and by her grace, they would be triumphant in this war and reclaim their kingdom soon.
The sons of King Pandu are called Pandavas and it may be used for any of the five brothers. In this verse, the Pandava being referred to is Arjun, the third among the five. He was a mighty warrior and a superior archer. His magnificent chariot was a gift from Agni, the celestial god of fire.
In this verse, Shree Krishna is addressed as "Hrishikesh" which means the Lord of the mind and senses. Shree Krishna is the Sovereign Master of everybody's minds and senses. Throughout his wonderful pastimes, he displayed complete control over his mind and senses.