Mbh 7.186.1

“Sanjaya said, ‘When three-fourths of that night had worn away, the battle, O king, once more commenced between the Kurus and the Pandavas. Both sides were elated with joy. Soon after, Aruna, the charioteer of Surya, weakening the splendour of the moon, appeared, causing the welkin to assume a coppery hue. The east was soon reddened with the red rays of the sun that resembled a circular plate of gold. Then all the warriors of the Kuru and the Pandava hosts, alighting from cars and steeds and vehicles borne by men, stood, with joined hands, facing the sun, and uttered the prayers of the twilight of dawn. The Kuru army having been divided into two bodies, Drona, with Duryodhana before him, proceeded (with one of those divisions) against the Somakas, the Pandavas, and the Panchalas. Beholding the Kuru host divided into two bodies, Madhava addressed Arjuna and said, “Keeping thy foes to thy left, place this division (commanded by Drona) to thy right.” Obedient to the counsels of Madhava in respect of the Kurus, Dhananjaya moved to the left of those two mighty bowmen, viz., Drona and Karna. Understanding the intentions of Krishna, that subjugator of hostile cities, viz., Bhimasena, addressing Partha who was then staying at the van of battle, said these words.