Mbh 8.30.2

"'Whilst thy warriors were thus engaged in battle from desire of victory, the Sun approaching the Setting Mountain, entered it. In consequence of the darkness, O king, but especially owing to the dust, we could not notice anything favourable or unfavourable. The mighty bowmen (amongst the Kauravas), fearing a night-battle, O Bharata, then retired from the field, accompanied by all their combatants. Upon the retirement of the Kauravas, O king, at the close of the day, the Parthas, cheerful at having obtained the victory, also retired to their own encampment, jeering at their enemies by producing diverse kinds of sounds with their musical instruments, and applauding Acyuta and Arjuna. After those heroes had thus withdrawn the army, all the troops and all the kings uttered benediction upon the Pandavas. The withdrawal having been made, those sinless men, the Pandavas, became very glad, and proceeding to their tents rested there for the night. Then Rakshasas and Pishacas, and carnivorous beasts, in large numbers came to that awful field of battle resembling the sporting ground of Rudra himself.'"