Mahabharata Virat Parva Chapter 30:2

Mahabharata Virat Parva Chapter 30:2 We will, with all the Kauravas go to the appointed place. Let also the mighty warrior, king Susarman, accompanied by a sufficient force with vehicles and animals, set out with the Trigartas for the dominions of Matsyas. And let Susarman proceed first, carefully concealing his intention. Following in their wake, we will set out the day after in close array, for the prosperous dominions of king Matsya. Let the Trigartas, however, suddenly repair to the city of Virata, and coming upon the cowherds, seize that immense wealth (of kine). We also marching in two divisions, will seize thousands of excellent kine furnished with auspicious marks.'" Vaisampayana continued, "Then, O Lord of earth, those warriors, the Trigartas, accompanied by their infantry of terrible prowess, marched towards the south-eastern direction, intending to wage hostilities with Virata from the desire of seizing his kine. And Susarman set out on the seventh day of the dark fortnight for seizing the kine. And then, O king, on the eighth day following of the dark fortnight, the Kauravas also accompanied by all their troops, began to seize the kine by thousands."