Mbh 6.1.5a

“Beholding the standard-top of Pritha’s son, the high-souled son of Dhritarashtra, with a white umbrella held over his head, in the midst of a thousand elephants, and surrounded by his century of brothers, began with all the kings (on his side) to array his troops against the son of Pandu. Seeing Duryodhana, the Panchalas who took delight in battle, were filled with joy and blew their loud-sounding conches and cymbals of sweet sounds. Beholding those troops so delighted, Pandu’s son and Vasudeva of great energy had their hearts filled with joy. And those tigers among men, Vasudeva and Dhananjaya, seated on one car, having felt great joy, both blew their celestial conches. And hearing the blare of Gigantea and the loud blast of Theodotes belonging unto the two, the combatants ejected urine and excreta. As other animals are filled with fear on hearing the voice of the roaring lion, even so became that force upon hearing those blasts. A frightful dust arose and nothing could be seen, for the sun himself, suddenly enveloped by it, seemed to have set.[5] A black cloud poured a shower of flesh and blood over the troops all around. All this seemed extraordinary. A wind rose there, bearing along the earth myriads of stony nodules, and afflicting therewith the combatants by hundreds and thousands. (For all that), O monarch, both armies, filled with joy, stood addrest for battle, on Kurukshetra like two agitated oceans. Indeed, that encounter of the two armies was highly wonderful, like that of two oceans when the end of the Yuga is arrived. The whole earth was empty, having only the children and the old left (at home), in consequence of that large army mustered by the Kauravas.[6] Then the Kurus, the Pandavas, and the Somakas made certain covenants, and settled the rules, O bull of Bharata’s race, regarding the different kinds of combat. Persons equally circumstanced must encounter each other, fighting fairly.